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Calgary Winter Storm and Extreme Cold delivers heavy snowfall, ECCC warnings, blowing snow, icy roads, and dangerous wind chill across southern Alberta, as a low-pressure system and northerly inflow fuel hazardous travel and frostbite risks.

Key Points

A severe Alberta storm with heavy snow, strong winds, ECCC warnings, dangerous wind chill, and high frostbite risk.

✅ ECCC extends snowfall and winter storm warnings regionwide.

✅ Wind chill -28 to -47; frostbite possible within 5-30 minutes.

✅ AMA rescues surge; non-essential travel strongly discouraged.

Calgary and much of southern Alberta faced a significant winter storm that brought heavy snowfall, strong winds, and dangerously low temperatures. Environment and Climate Change Canada (ECCC) issued extended and expanded snowfall and winter storm warnings as persistent precipitation streamed along the southern borders. The combination of a low-pressure system off the West Coast, where a B.C. 'bomb cyclone' had left tens of thousands without power, and a northerly inflow at the surface led to significant snow accumulations in a short period.

The storm resulted in poor driving conditions across much of southern Alberta, with snow-packed and icy roads, as well as limited visibility due to blowing snow. ECCC advised postponing non-essential travel until conditions improved. As of 10 a.m. on January 17, the 511 Alberta map showed poor driving conditions throughout the region, while B.C. electricity demand hit an all-time high amid the cold.

In Calgary, the city recorded four centimeters of snow on January 16, with an additional four centimeters expected on January 17. Temperatures remained far below seasonal averages until the end of the week, and Calgary electricity use tends to surge during such cold snaps according to Enmax, with improvements starting on Sunday.

The extreme cold posed significant risks, with wind chills of -28 to -39 capable of causing frostbite in 10 to 30 minutes, as a Quebec power demand record illustrated during the deep freeze. When wind chills dropped to -40 to -47, frostbite could occur in as little as five to 10 minutes. Residents were advised to watch for signs of frostbite, including color changes on fingers and toes, pain, numbness, tingling sensations, or swelling. Those most at risk included young children, older adults, people with chronic illnesses, individuals working or exercising outdoors, and those without proper shelter.

In response to the severe weather, the Alberta Motor Association (AMA) experienced a surge in calls for roadside assistance. Between January 12 and 14, there were approximately 32,000 calls, with about 22,000 of those requiring rescues between January 12 and 14. The high volume of requests led the AMA to temporarily cease providing wait time updates on their website due to the inability to provide accurate information, while debates over Alberta electricity prices also intensified during the cold.

The storm also had broader implications across Canada. Heavy snow was expected to fall across wide swaths of southern British Columbia and parts of southern Alberta, as BC Hydro's winter payment plan offered billing relief to customers during the stretch. Northern Alberta was under extreme cold warnings, with temperatures expected to dip to -40°C through the rest of the week. Similar extreme cold was forecast for southern Ontario, with wind chill values reaching -30°C.

As the storm progressed, conditions began to improve. The wind warning for central Alberta ended by January 17, though a blowing snow advisory remained in effect for the southeast corner of the province. Northwest winds gusting up to 90 km/h combined with falling snow continued to cause poor visibility in some areas, while California power outages and landslides were reported amid concurrent severe storms along the coast. Conditions were expected to improve by mid-morning.

In the aftermath of the storm, residents were reminded of the importance of preparedness and caution during severe winter weather. Staying informed through official weather advisories, adjusting travel plans, and taking necessary precautions can help mitigate the risks associated with such extreme conditions.

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USDA Rural Energy Infrastructure Funding boosts renewable energy, BESS, and transmission upgrades, delivering grid modernization, resilience, and clean power to rural cooperatives through loans and grants aligned with climate goals, decarbonization, and energy independence.

Key Points

USDA Rural Energy Infrastructure Funding is a $4.37B program advancing renewables, BESS, and grid upgrades for rural power.

✅ Loans and grants for cooperatives modernizing rural grids.

✅ Prioritizes BESS to integrate wind and solar reliably.

✅ Upgrades transmission to cut losses and boost grid stability.

The U.S. Department of Agriculture (USDA) has announced a major investment of $4.37 billion aimed at upgrading rural electric cooperatives across the nation. This funding will focus on advancing renewable energy projects, enhancing battery energy storage systems (BESS), and upgrading transmission infrastructure to support a grid overhaul for renewables nationwide.

The USDA’s Rural Development initiative will provide loans and grants to cooperatives, supporting efforts to transition to cleaner energy sources that help rural America thrive, improve energy resilience, and modernize electrical grids in rural areas. These upgrades are expected to bolster the reliability and efficiency of energy systems, making rural communities more resilient to extreme weather events and fostering the expansion of renewable energy.

The funding will primarily support energy storage technologies, such as BESS, which allow excess energy from renewable sources like wind energy, solar, and hydropower technology to be stored and used during periods of high demand or when renewable generation is low. These systems are critical for integrating more renewable energy into the grid, ensuring a stable and sustainable power supply.

In addition to energy storage, the USDA’s investment will go toward enhancing the transmission networks that carry electricity across rural regions, aligning with a recent rule to boost renewable transmission across the U.S. By upgrading these systems, the USDA aims to reduce energy losses, improve grid stability, and ensure that rural communities have reliable access to power, particularly in remote and underserved areas.

This investment aligns with the Biden administration’s broader climate and clean energy goals, focusing on reducing greenhouse gas emissions and fostering sustainable energy practices, including next-generation building upgrades that lower demand. The USDA's support will also promote energy independence in rural areas, enabling local cooperatives to meet the energy demands of their communities while decreasing reliance on fossil fuels.

The funding is expected to have a far-reaching impact, not only reducing carbon footprints but also creating jobs in the renewable energy and construction sectors. By modernizing energy infrastructure, rural electric cooperatives can expand access to clean, affordable energy while contributing to the nationwide shift toward a more sustainable energy future.

The USDA’s commitment to supporting rural electric cooperatives marks a significant step in the transition to a more resilient and sustainable energy grid, mirroring grid modernization projects in Canada seen in recent years. By investing in renewables and modernizing transmission and storage systems, the government aims to improve energy access and reliability in rural communities, ultimately driving the growth of a cleaner, more energy-efficient economy.

As part of the initiative, the USDA has also highlighted its commitment to helping rural cooperatives navigate the challenges of implementing new technologies and infrastructure. The agency has pledged to provide technical assistance, ensuring that cooperatives have the resources and expertise needed to successfully complete these projects.

In conclusion, the USDA’s $4.37 billion investment represents a significant effort to improve the energy landscape of rural America. By supporting the development of renewable energy, energy storage, and transmission upgrades, the USDA is not only fostering a cleaner energy future but also enhancing the resilience of rural communities. This initiative will contribute to the nationwide transition toward a sustainable, low-carbon economy, ensuring that rural areas are not left behind in the global push for renewable energy.

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COVID-19 Energy Burden drives higher electricity bills as income falls, intensifying energy poverty, utility shut-offs, and affordability risks for low-income households; policy moratoriums, bill relief, and efficiency upgrades are vital responses.

Key Points

The COVID-19 energy burden is the rising share of income spent on energy as bills increase and earnings decline.

✅ Rising home demand and lost wages increase energy cost share.

✅ Mandated shut-off moratoriums and reconnections protect health.

✅ Fund assistance, efficiency, and solar for LMI households.

I have asthma. It’s a private piece of medical information that I don’t normally share with people, but it makes the potential risks associated with exposure to the coronavirus all the more dangerous for me. But I’m not alone. 107 million people in the U.S. have pre-existing medical conditions like asthma and heart disease; the same pre-existing conditions that elevate their risk of facing a life-threatening situation were we to contract COVID-19. There are, however, tens of millions more house-bound Americans with a condition that is likely to be exacerbated by COVID-19: The energy burden.

The energy burden is a different kind of pre-existing condition:
In the last four weeks, 22 million people filed for unemployment. Millions of people will not have steady income (or the healthcare tied to it) to pay rent and utility bills for the foreseeable future which means that thousands, possibly millions of home-bound Americans will struggle to pay for energy.

Your energy burden is the amount of your monthly income that goes to paying for energy, like your monthly electric bill. So, when household energy use increases or income decreases, your energy burden rises. The energy burden is not a symptom of the pandemic and the economic downturn; it is more like a pre-existing condition for many Americans.

Before the coronavirus outbreak, I shared a few maps that showed how expensive electricity is for some. The energy burden in most pronounced in places already struggling economically, like in Appalachia, where residents in some counties must put more than 30 percent of their income toward their electric bills, and in the Midwest where states such as Michigan have some families spending more than 1/5 of their income on energy bills. The tragic facts are that US families living below the poverty line are far more likely to also be suffering from their energy burden.

But like other pre-existing conditions, the impacts of the coronavirus pandemic are exacerbating the underlying problems afflicting communities across the country.

Critical responses to minimize the spread of COVID-19 are social distancing, washing hands frequently, covering our faces with masks and staying at home. More time at home for most will drive up energy bills, and not by a little. Estimates on how much electricity demand during COVID-19 will increase vary but I’ve seen estimates as high as a 20% increase on average. For some families that’s a bag of groceries or a refill on prescription medication.

What happens when the power gets turned off?
Under normal conditions, if you cannot pay your electric bill your electricity can get turned off. This can have devastating consequences. Most states have protections for health and medical reasons and some states have protections during extreme heat or cold weather. But enforcement of those protections can vary by utility service area and place unnecessary burdens on the customer.

UCS
Only Florida has no protections of any kind against utility shut-offs when health or medical reasons would merit protection against it. However, when it comes to protection against extreme heat, only a few states have mandatory protections based on temperature thresholds.

The NAACP has also pointed out that utilities have unceremoniously disconnected the power of millions of people, disproportionally African-American and Latinx households.

April tends to be a mild month for most of the country, but the South already had its first heat wave at the end of March. If this pandemic lasts into the summer, utility disconnects could become deadly, and efforts to prevent summer power outages will be even more critical to public health. In the summer, during extreme summer heat families can’t turn off the A/C and go to the movies if we are following public health measures and sheltering in place. Lots of families that don’t have or can’t afford to run A/C would otherwise gather at local community pools, beaches, or in cooling centers, but with parks, pools and community groups closed to prevent the virus’s spread, what will happen to these families in July or August?

But we won’t have to wait till the summer to see how families will be hard hit by falling behind on bills and losing power. Here are a few ways electricity disconnection policies cause people harm during the pandemic:

Loss of electricity during the COVID-19 pandemic means families will lose their ability to refrigerate essential food supplies.
Child abuse guidance discusses how unsanitary household conditions are a contributing factor to child protective services involvement. Unsanitary household conditions can include, for example, rotting food (which might happen if electricity is cut off).

HUD’s handbook on federally subsidized housing includes a chapter on termination, which says that lease agreements can be terminated for repeated minor infractions including failing to pay utilities.
Airway machines used to treat respiratory ailments—pre-existing conditions in this pandemic—will not work. Our elderly neighbors in particular might rely on medicine that requires refrigeration or medical equipment that requires electricity. They too have fallen victim to utility shut-offs even during the pandemic.

Empowering solutions are available today

Decisionmakers seeking solutions can look to implement utility shut off moratoriums as a good start. Good news is that many utilities have voluntarily taken action to that effect, and New Jersey and New York have suspended shut-offs, one of the best trackers on who is taking what action has been assembled by Energy Policy Institute.

But voluntary actions do not always provide comprehensive protection, and they certainly have not been universally adopted across the country. Some utilities are waiving fees as relief measures, and some moratoriums only apply to customers directly affected by COVID-19, which will place additional onerous red tape on households that are stricken and perhaps unable to access testing. Others might only be an extension of standard medical shut off protections. Moratoriums put in place by voluntary action can also be revoked or lifted by voluntary action, which does not provide any sense of certainty to people struggling to make ends meet.

This is why the US needs mandatory moratoriums on all utility disconnections. These normally would be rendered at the state level, either by a regulatory commission, legislative act, or even an emergency executive order. But the inconsistent leadership among states in response to the COVID-19 crisis suggests that Congressional action is needed to ensure that all vulnerable utility customers are protected. That’s exactly what a coalition of organizations, including UCS, is calling for in future federal aid legislation. UCS has called for a national moratorium on utility shut-offs.

And let’s be clear, preventing new shut-offs isn’t enough. Cutting power off at residence during a pandemic is not good public policy. People who are without electricity should have it restored so residents can safely shelter in place and help flatten the curve. So far, only Colorado and Wisconsin’s leadership has taken this option.

Addressing the root causes of energy poverty
Preventing shut-offs is a good first step, but the increased bill charges will nevertheless place greater economic pressure on an incalculable number of families. Addressing the root of the problem (energy affordability) must be prioritized when we begin to recover from the health and economic ramifications of the COVID-19 pandemic.

One way policymakers can do that is to forgive outstanding balances on utility bills, perhaps with an eligibility cap based on income. Additional funds could be made available to those who are still struggling to pay their bills via capping bills, waiving late payment fees, automating payment plans or other protective measures that rightfully place consumers (particularly vulnerable consumers) at the center of any energy-related COVID-19 response. Low-and-moderate-income energy efficiency and solar programs should be funded as much as practically possible.

New infrastructure, particularly new construction that is slated for public housing, subsidized housing, or housing specifically marketed for low- and moderate-income families, should include smart thermostats, better insulation, and energy-efficient appliances.

Implementing these solutions may seem daunting, let us not forget that one of the best ways to ease people’s energy burden is to keep a utility’s overall energy costs low. That means state utility commissions must be vigilant in utility rate cases and fuel recovery cost dockets to protect people facing unfathomable economic pressures. Unscrupulous utilities have been known to hide unnecessary costs in our energy bills. Commissions and their staff are overwhelmed at this time, but they should be applying extra scrutiny during proceedings when utilities are recovering costs associated with delivering energy.

What might a utility try to get past the commission?
Well, residential demand is up, so for many people, bills will increase. However, wholesale electricity rates are low right now, in some cases at all-time lows. Why? Because industrial and commercial demand reductions (from social distancing at home) have more than offset residential demand increases. Overall US electricity demand is flat or declining, and supply/demand economics predicts that when demand decreases, prices decrease.

At the same time, natural gas prices have set record lows each month of this year and that’s a trend that is expected to hold true for a while.

Low demand plus low gas prices mean wholesale market prices are incredibly low. Utilities should be taking advantage of low market prices to ensure that they deliver electricity to customers at as low a cost as possible. Utilities must also NOT over-run coal plants uneconomically or lean on aging capacity despite disruptions in coal and nuclear that can invite brownouts because that will not only needlessly cost customers more, but it will also increase air pollution which will exacerbate respiratory issues and susceptibility to COVID-19, according to a recent study published by Harvard.

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Juba Power Distribution Expansion accelerates grid rehabilitation in South Sudan, adding concrete poles, medium and low voltage networks, and LED street lighting, funded by AfDB and executed by Power China for reliable, affordable electricity.

Key Points

A project to upgrade Juba's grid with concrete poles, MV-LV networks, and LED lighting for reliable, affordable power.

✅ 13,350 concrete poles produced locally for network rollout

✅ Medium and low voltage network rehabilitation and expansion

✅ LED street lighting and customer care improvements funded by AfDB

The South Sudan government has launched a factory producing concrete poles that will facilitate an ambitious project done by a Chinese company to rehabilitate and expand the Power Distribution System in Juba, its capital.

The Minister of Dams and Electricity, Dhieu Mathok, said that the factory, rented by Power China, will produce some 13,350 poles for the electricity distribution in the capital and other states.

"The main objective of this project is to increase the supply capacity and reliability of the power distribution system in Juba. Access to the grid will replace the use of generators by the population, allow supply of energy at more affordable price and, hence contribute toward economic growth and poverty eradication in South Sudan," Mathok said during the inauguration of the plant along the Yei road in Juba.

#google#

He disclosed that it will help solve the problem associated with non-availability of concrete poles for the project and to mitigate the risk of importing poles from other countries.

"This factory will create positive impact on the construction of the national grid in South Sudan. It is owned by South Sudanese business people but currently it has been taken over by Power China for a brief period of one year," he said.

South Sudan is largely generator driven economy with continued electricity blackout, and across the continent initiatives like Cape Town's municipal power build-out illustrate alternative approaches, in the wake of the collapse of the generator power plant operated by the South Sudan Electricity Corporation (SSEC) in 2013.

Wang Cun, an official with Power China said they got the contract to build the electricity project in June 2016 and that they will continue to support South Sudanese staff with skills and knowledge, drawing on advances such as PEM green hydrogen R&D that point to future low-carbon options, and also work with the government on several major power projects.

"We have achieved much from these projects and we also suffered much from the instability and continuous conflicts all these years, but we confirm and believe the year of 2018 will be a year of peace and development in South Sudan," Wang said, adding that the company has been operating in South Sudan since 2009.

He disclosed that Power China has conducted several projects before South Sudan won independence from Sudan in 2011 such as the peace road project from Renk to Malakal, Maridi water plant and Malakal municipal road projects.

Wang said they will immediately reorganize all necessary resources to increase post-production capacity and immediately shall commence the erection of these poles to all corners of Juba city and start the distribution.

"We shall do as we did before to recruit more local technicians, engineers and laborers during the construction period, so that they are there in place for similar projects in the near future. We shall make more efforts to improve these local staffs' working environment and to realize sustainable development of Power China and Sino-hydro in South Sudan," said Wang.

Power China has been committing itself in the economic development of South Sudan and has signed eight commercial contracts with the government of South Sudan since independence like the Juba-hydro power project and the Tharjiath thermal power plant project, while in China projects such as the Lawa hydropower station demonstrate ongoing hydropower expertise that can inform regional work.

Liu Xiaodong, the Charge d'Affaires at the Chinese embassy in South Sudan, said Power China has been working very hard in the engineering and procurement in the earlier stage of the project, and as China expands energy ties such as nuclear cooperation with Cambodia that demonstrate broader engagement, also thanked the South Sudan government and the African Development Bank for their strong support.

Liu added upon completion Juba will have an upgraded power distribution system with 2,250 lighting points along the main roads in the capital and lamps will be LED ones.

The project falls under the Juba Power Distribution System Rehabilitation and Expansion Project, which was funded by the African Development Bank (AfDB) and has undertaken an AfDB review of a Senegal power plant to inform regional energy decisions.

It comprises of five different lots like Rehabilitation of Diesel plant substation, Rehabilitation and Expansion of medium voltage network, low voltage network, and Rehabilitation and Expansion of street lighting and improvement of customer care.

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Renewables' Impact on US Wholesale Electricity Prices is clear: DOE analysis shows wind and solar, capacity gains, and natural gas lowering rates, shifting daily patterns, and triggering occasional negative pricing in PJM and ERCOT.

Key Points

DOE data show wind and solar lower wholesale prices, reshape price curves, and cause negative pricing in markets.

✅ Natural gas price declines remain the largest driver of cheaper power

✅ Wind and solar shift seasonal and time-of-day price patterns

✅ Negative wholesale prices appear near high wind and solar output

One of the arguments that's consistently been raised against doing anything about climate change is that it will be expensive. On the more extreme end of the spectrum, there have been dire warnings about plunging standards of living due to skyrocketing electricity prices. The plunging cost of renewables like solar cheaper than gas has largely silenced these warnings, but a new report from the Department of Energy suggests that, even earlier, renewables were actually lowering the price of electricity in the United States.

Plunging prices
The report focuses on wholesale electricity prices in the US. Note that these are distinct from the prices consumers actually pay, which includes taxes, fees, payments to support the grid that delivers the electricity, and so on. It's entirely possible for wholesale electricity prices to drop even as consumers end up paying more, and market reforms determine how those changes are passed through. That said, large changes in the wholesale price should ultimately be passed on to consumers to one degree or another.

The Department of Energy analysis focuses on the decade between 2008 and 2017, and it includes an overall analysis of the US market, as well as large individual grids like PJM and ERCOT and, finally, local prices. The decade saw a couple of important trends: low natural gas prices that fostered a rapid expansion of gas-fired generators and the rapid expansion of renewable generation that occurred concurrently with a tremendous drop in price of wind and solar power.

Much of the electricity generated by renewables in this time period would be more expensive than that generated by wind and solar installed today. Not only have prices for the hardware dropped, but the hardware has improved in ways that provide higher capacity factors, meaning that they generate a greater percentage of the maximum capacity. (These changes include things like larger blades on wind turbines and tracking systems for solar panels.) At the same time, operating wind and solar is essentially free once they're installed, so they can always offer a lower price than competing fossil fuel plants.

With those caveats laid out, what does the analysis show? Almost all of the factors influencing the wholesale electricity price considered in this analysis are essentially neutral. Only three factors have pushed the prices higher: the retirement of some plants, the rising price of coal, and prices put on carbon, which only affect some of the regional grids.

In contrast, the drop in the price of natural gas has had a very large effect on the wholesale power price. Depending on the regional grid, it's driven a drop of anywhere from $7 to $53 per megawatt-hour. It's far and away the largest influence on prices over the past decade.

Regional variation and negative prices
But renewables have had an influence as well. That influence has ranged from roughly neutral to a cost reduction of $2.2 per MWh in California, largely driven by solar. While the impact of renewables was relatively minor, it is the second-largest influence after natural gas prices, and the data shows that wind and solar are reducing prices rather than increasing them.

The reports note that renewables are influencing wholesale prices in other ways, however. The growth of wind and solar caused the pattern of seasonal price changes to shift in areas of high wind and solar, as seen with solar reshaping prices in Northern Europe as daylight hours and wind patterns shift with the seasons. Similarly, renewables have a time-of-day effect for similar reasons, helping explain why the grid isn't 100% renewable today, which also influences the daily timing price changes, something that's not an issue with fossil fuel power.

A map showing the areas where wholesale electricity prices have gone negative, with darker colors indicating increased frequency.
Enlarge / A map showing the areas where wholesale electricity prices have gone negative, with darker colors indicating increased frequency.

US DOE
One striking feature of areas where renewable power is prevalent is that there are occasional cases in which an oversupply of renewable energy produces negative electricity prices in the wholesale market. (In the least-surprising statement in the report, it concludes that "negative prices in high-wind and high-solar regions occurred most frequently in hours with high wind and solar output.") In most areas, these negative prices are rare enough that they don't have a significant influence on the wholesale price.

That's not true everywhere, however. Areas on the Great Plains see fairly frequent negative prices, and they're growing in prevalence in areas like California, the Southwest, and the northern areas of New York and New England, while negative prices in France have been observed in similar conditions. In these areas, negative wholesale prices near solar plants have dropped the overall price by 3%. Near wind plants, that figure is 6%.

None of this is meant to indicate that there are no scenarios where expanded renewable energy could eventually cause wholesale prices to rise. At sufficient levels, the need for storage, backup plants, and grid management could potentially offset their low costs, a dynamic sometimes referred to as clean energy's dirty secret by analysts. But it's clear we have not yet reached that point. And if the prices of renewables continue to drop, then that point could potentially recede fast enough not to matter.

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Bitcoin Energy Consumption drives debate on blockchain mining, proof-of-work, carbon footprint, and emissions, with CCAF estimates in terawatt hours highlighting electricity demand, fossil fuel reliance, and sustainability concerns for data centers and cryptocurrency networks.

Key Points

Electricity used by Bitcoin proof-of-work mining, often fossil-fueled, estimated by CCAF in terawatt hours.

✅ CCAF: 40-445 TWh, central estimate ~130 TWh

✅ ~66% of mining electricity sourced from fossil fuels

✅ Proof-of-work increases hash rate, energy, and emissions

The University of Cambridge Centre for Alternative Finance (CCAF) studies the burgeoning business of cryptocurrencies.

It calculates that Bitcoin's total energy consumption is somewhere between 40 and 445 annualised terawatt hours (TWh), with a central estimate of about 130 terawatt hours.

The UK's electricity consumption is a little over 300 TWh a year, while Argentina uses around the same amount of power as the CCAF's best guess for Bitcoin, as countries like New Zealand's electricity future are debated to balance demand.

And the electricity the Bitcoin miners use overwhelmingly comes from polluting sources, with the U.S. grid not 100% renewable underscoring broader energy mix challenges worldwide.

The CCAF team surveys the people who manage the Bitcoin network around the world on their energy use and found that about two-thirds of it is from fossil fuels, and some regions are weighing curbs like Russia's proposed mining ban amid electricity deficits.

Huge computing power - and therefore energy use - is built into the way the blockchain technology that underpins the cryptocurrency has been designed.

It relies on a vast decentralised network of computers.

These are the so-called Bitcoin "miners" who enable new Bitcoins to be created, but also independently verify and record every transaction made in the currency.

In fact, the Bitcoins are the reward miners get for maintaining this record accurately.

It works like a lottery that runs every 10 minutes, explains Gina Pieters, an economics professor at the University of Chicago and a research fellow with the CCAF team.

Data processing centres around the world, including hotspots such as Iceland's mining strain, race to compile and submit this record of transactions in a way that is acceptable to the system.

They also have to guess a random number.

The first to submit the record and the correct number wins the prize - this becomes the next block in the blockchain.

Estimates for bitcoin's electricity consumption
At the moment, they are rewarded with six-and-a-quarter Bitcoins, valued at about $50,000 each.

As soon as one lottery is over, a new number is generated, and the whole process starts again.

The higher the price, says Prof Pieters, the more miners want to get into the game, and utilities like BC Hydro suspending new crypto connections highlight grid pressures.

"They want to get that revenue," she tells me, "and that's what's going to encourage them to introduce more and more powerful machines in order to guess this random number, and therefore you will see an increase in energy consumption," she says.

And there is another factor that drives Bitcoin's increasing energy consumption.

The software ensures it always takes 10 minutes for the puzzle to be solved, so if the number of miners is increasing, the puzzle gets harder and the more computing power needs to be thrown at it.

Bitcoin is therefore actually designed to encourage increased computing effort.

The idea is that the more computers that compete to maintain the blockchain, the safer it becomes, because anyone who might want to try and undermine the currency must control and operate at least as much computing power as the rest of the miners put together.

What this means is that, as Bitcoin gets more valuable, the computing effort expended on creating and maintaining it - and therefore the energy consumed - inevitably increases.

We can track how much effort miners are making to create the currency.

They are currently reckoned to be making 160 quintillion calculations every second - that's 160,000,000,000,000,000,000, in case you were wondering.

And this vast computational effort is the cryptocurrency's Achilles heel, says Alex de Vries, the founder of the Digiconomist website and an expert on Bitcoin.

All the millions of trillions of calculations it takes to keep the system running aren't really doing any useful work.

"They're computations that serve no other purpose," says de Vries, "they're just immediately discarded again. Right now we're using a whole lot of energy to produce those calculations, but also the majority of that is sourced from fossil energy, and clean energy's 'dirty secret' complicates substitution."

The vast effort it requires also makes Bitcoin inherently difficult to scale, he argues.

"If Bitcoin were to be adopted as a global reserve currency," he speculates, "the Bitcoin price will probably be in the millions, and those miners will have more money than the entire [US] Federal budget to spend on electricity."

"We'd have to double our global energy production," he says with a laugh, even as some argue cheap abundant electricity is getting closer to reality today. "For Bitcoin."

He says it also limits the number of transactions the system can process to about five per second.

This doesn't make for a useful currency, he argues.

Rising price of bitcoin graphic
And that view is echoed by many eminent figures in finance and economics.

The two essential features of a successful currency are that it is an effective form of exchange and a stable store of value, says Ken Rogoff, a professor of economics at Harvard University in Cambridge, Massachusetts, and a former chief economist at the International Monetary Fund (IMF).

He says Bitcoin is neither.

"The fact is, it's not really used much in the legal economy now. Yes, one rich person sells it to another, but that's not a final use. And without that it really doesn't have a long-term future."

What he is saying is that Bitcoin exists almost exclusively as a vehicle for speculation.

So, I want to know: is the bubble about to burst?

"That's my guess," says Prof Rogoff and pauses.

"But I really couldn't tell you when."

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