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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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Global Coal Power Decline 2019 signals a record fall in coal-fired electricity as China plateaus, India dips, and the EU and US accelerate renewables, curbing carbon emissions and advancing the global energy transition.

Key Points

A record 2019 drop in global coal power as renewables rise and demand slows across China, India, the EU, and the US.

✅ 3% global fall in coal-fired electricity in 2019.

✅ China plateaus; India declines for first time in decades.

✅ EU and US shift to renewables and gas, cutting emissions.

The world’s use of coal-fired electricity is on track for its biggest annual fall on record this year after more than four decades of near-uninterrupted growth that has stoked the global climate crisis.

Data shows that coal-fired electricity is expected to fall by 3% in 2019, or more than the combined coal generation in Germany, Spain and the UK last year and could help stall the world’s rising carbon emissions this year.

The steepest global slump on record is likely to emerge in 2019 as India’s reliance on coal power falls for the first time in at least three decades this year, and China’s coal power demand plateaus, reflecting the broader global energy transition underway.

Both developing nations are using less coal-fired electricity due to slowing economic growth in Asia as well as the rise of cleaner energy alternatives. There is also expected to be unprecedented coal declines across the EU and the US as developed economies turn to clean forms of energy such as low-cost solar power to replace ageing coal plants.

In almost 40 years the world’s annual coal generation has fallen only twice before: in 2009, in the wake of the global financial crisis, and in 2015, following a slowdown in China’s coal plants amid rising levels of deadly air pollution.

The research was undertaken by the Centre for Research on Energy and Clean Air , the Institute for Energy Economics and Financial Analysis and the UK climate thinktank Sandbag.

The researchers found that China’s coal-fired power generation was flatlining, despite an increase in the number of coal plants being built, because they were running at record low rates. China builds the equivalent of one large new coal plant every two weeks, according to the report, but its coal plants run for only 48.6% of the time, compared with a global utilisation rate of 54% on average.

The findings come after a report from Global Energy Monitor found that the number of coal-fired power plants in the world is growing, because China is building new coal plants five times faster than the rest of the world is reducing their coal-fired power capacity.

The report found that in other countries coal-fired power capacity fell by 8GW in the 18 months to June but over the same period China increased its capacity by 42.9GW.

In a paper for the industry journal Carbon Brief, the researchers said: “A 3% reduction in power sector coal use could imply zero growth in global CO2 emissions, if emissions changes in other sectors mirror those during 2018.”

However, the authors of the report have warned that despite the record coal power slump the world’s use of coal remained far too high to meet the climate goals of the Paris agreement, and some countries are still seeing increases, such as Australia’s emissions rise amid increased pollution from electricity and transport.

The US – which is backing out of the Paris agreement – has made the deepest cuts to coal power of any developed country this year by shutting coal plants down in favour of gas power and renewable energy, with utilities such as Duke Energy facing investor pressure to disclose climate plans. By the end of August the US had reduced coal by almost 14% over the year compared with the same months in 2018.

The EU reported a record slump in coal-fired electricity use in the first half of the year of almost a fifth compared with the same months last year. This trend is expected to accelerate over the second half of the year to average a 23% fall over 2019 as a whole. The EU is using less coal power in favour of gas-fired electricity – which can have roughly half the carbon footprint of coal – and renewable energy, helped by policies such as the UK carbon tax that have slashed coal-fired generation.

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FPL Rate Increase Proposal 2026-2029 outlines $9B base-rate hikes as Florida grows, citing residential demand, grid infrastructure investments, energy mix diversification, and Florida PSC review impacting customer bills, reliability, and fuel price volatility mitigation.

Key Points

A $9B base-rate plan FPL filed with the Florida PSC to fund growth, grid upgrades, and energy diversification through 2029.

✅ Adds 275k since 2021; +335k customers projected by 2029.

✅ Monthly bills rise to about $157 by 2029, up ~22% total.

✅ Investments in poles, wires, transformers, substations, renewables.

Florida Power & Light (FPL), the state's largest utility provider, has submitted a proposal to the Florida Public Service Commission (PSC) seeking a substantial increase in customer base rates over the next four years, amid ongoing scrutiny, including a recent hurricane surcharge controversy that heightened public attention.

Rationale Behind the Rate Increase

FPL's request is primarily influenced by Florida's robust population growth. Since 2021, the utility has added about 275,000 customers and projects an additional 335,000 by the end of 2029. This surge necessitates significant investments in transmission and distribution infrastructure, including poles, wires, transformers, and substations, to maintain reliable service. Moreover, FPL aims to diversify its energy mix to shield customers from fuel price volatility, even as the state declined federal solar incentives that could influence renewable adoption, ensuring a stable and sustainable power supply.

Impact on Customer Bills

If approved, the proposed rate increases would affect residential customers as follows:

• 2026: An estimated increase of $11.52 per month, raising the typical bill to $145.66.

• 2027: An additional $6.05 per month, bringing the bill to $151.71.

• 2028: A further increase of $3.64 per month, totaling $155.35.

• 2029: An extra $2.06 per month, resulting in a final bill of $157.41.

These adjustments represent a cumulative increase of approximately 22% over the four-year period, while in other regions some customers face sharper spikes, such as Pennsylvania's winter price increases this season.

Comparison with Previous Rate Hikes

This proposal follows a series of rate increases approved in recent years, as California electricity bills have soared and prompted calls for action in that state. For instance, Tampa Electric Co. (TECO) received approval for rate hikes totaling $287.9 million in 2025, with additional increases planned for 2026 and 2027. Consumer groups have expressed intentions to challenge these rate hikes, indicating a trend of growing scrutiny over utility rate adjustments.

Regulatory Review Process

The PSC is scheduled to review FPL's rate increase proposal in the coming months. A staff recommendation is expected by March 14, 2025, with a final decision anticipated at a commission conference on March 20, 2025. This process allows for public input and thorough evaluation of the proposed rate changes, while elsewhere some utilities anticipate stabilization, such as PG&E's 2025 outlook in California.

Customer and Consumer Advocacy Responses

The proposed rate hikes have elicited concerns from consumer advocacy groups. Organizations like Food & Water Watch have criticized the scale of the increase, labeling it as the largest rate hike request in U.S. history, amid mixed signals such as Gulf Power's one-time 40% bill decrease earlier this year. They argue that such substantial increases could place undue financial strain on households, especially those with fixed incomes.

Additionally, the Florida Public Service Commission has faced challenges in approving rate hikes for other utilities, such as TECO, and a recent Florida court decision on electricity monopolies that may influence the policy landscape, with consumer groups planning to appeal these decisions. This backdrop of heightened scrutiny suggests that FPL's proposal will undergo rigorous examination.

As Florida continues to experience rapid growth, balancing the need for infrastructure development and reliable energy services with the financial impact on consumers remains a critical challenge. The PSC's forthcoming decisions will play a pivotal role in shaping the state's energy landscape, influencing both the economy and the daily lives of Floridians.

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Duke Energy Clean Energy Strategy targets smart grid upgrades, wind and solar expansion, efficient gas, and high-reliability nuclear, cutting CO2, boosting decarbonization, and advancing energy efficiency and reliability for the Carolinas.

Key Points

A plan investing in smart grids, renewables, gas, and nuclear to cut CO2 and enhance reliability and efficiency by 2030.

✅ US$25bn smart grid upgrades; US$11bn renewables and gas

✅ 40% CO2 reduction and >80% low-/zero-carbon generation by 2030

✅ 2017 nuclear fleet 95.64% capacity factor; ~90 TWh carbon-free

The US power group Duke Energy plans to invest US$25bn on grid modernization over the 2017-2026 period, including the implementation of smart grid technologies to cope with the development of renewable energies, along with US$11bn on the expansion of renewable (wind and solar) and gas-fired power generation capacities.

The company will modernize its fleet and expects more than 80% of its power generation mix to come from zero and lower CO2 emitting sources, aligning with nuclear and net-zero goals, by 2030. Its current strategy focuses on cutting down CO2 emissions by 40% by 2030. Duke Energy will also promote energy efficiency and expects cumulative energy savings - based on the expansion of existing programmes - to grow to 22 TWh by 2030, i.e. the equivalent to the annual usage of 1.8 million households.

#google#

Duke Energy’s 11 nuclear generating units posted strong operating performance in 2017, as U.S. nuclear costs hit a ten-year low, providing the Carolinas with nearly 90 billion kilowatt-hours of carbon-free electricity – enough to power more than 7 million homes.

Globally, China's nuclear program remains on a steady development track, underscoring broader industry momentum.

“Much of our 2017 success is due to our focus on safety and work efficiencies identified by our nuclear employees, along with ongoing emphasis on planning and executing refueling outages to increase our fleet’s availability for producing electricity,” said Preston Gillespie, Duke Energy chief nuclear officer.

Some of the nuclear fleet’s 2017 accomplishments include, as a new U.S. reactor comes online nationally:

• The 11 units achieved a combined capacity factor of 95.64 percent, second only to the fleet’s 2016 record of 95.72 percent, marking the 19th consecutive year of attaining a 90-plus percent capacity factor (a measure of reliability).
• The two units at Catawba Nuclear Station produced more than 19 billion kilowatt-hours of electricity, and the single unit at Harris Nuclear Plant generated more than 8 billion kilowatt-hours, both setting 12-month records.
• Brunswick Nuclear Plant unit 2 achieved a record operating run.
• Both McGuire Nuclear Station units completed their shortest refueling outages ever and unit 1 recorded its longest operating run.
• Oconee Nuclear Station unit 2 achieved a fleet record operating run.

The Robinson Nuclear Plant team completed the station’s 30th refueling outage, which included a main generator stator replacement and other life-extension activities, well ahead of schedule.

“Our nuclear employees are committed to providing reliable, clean electricity every day for our Carolinas customers,” added Gillespie. “We are very proud of our team’s 2017 accomplishments and continue to look for additional opportunities to further enhance operations.”

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BC Hydro Rate Freeze delivers immediate relief on electricity rates in British Columbia, reversing a planned 3% hike, as BCUC oversight, a utility review, and Site C project debates shape provincial energy policy.

Key Points

A one-year provincial policy halting BC Hydro electricity rate hikes while a utility review finds cost savings.

✅ Freeze replaces planned 3% hike approved by BCUC.

✅ Government to conduct comprehensive BC Hydro review.

✅ Critics warn $150M revenue loss impacts capital projects.

British Columbia's NDP government has announced it will freeze BC Hydro rates effective immediately, fulfilling a key election promise.

Energy, Mines and Petroleum Resources Minister Michelle Mungall says hydro rates have gone up by more than 24 per cent in the last four years and by more than 70 per cent since 2001, reflecting proposals such as a 3.75% increase over two years announced previously.

"After years of escalating electricity costs, British Columbians deserve a break on their bills," Mungall said in a news release.

BC Hydro had been approved by the B.C. Utilities Commission to increase the rate by three per cent next year, but Mungall said it will pull back its request in order to comply with the freeze.

In the meantime, the government says it will undertake a comprehensive review of the utility meant to identify cost-savings measures for customers often asked to pay an extra $2 a month on electricity bills.

The Liberal critic, Tracy Redies, says the one year rate freeze is going to cost BC Hydro, calling it a distraction from the bigger issue of the future of the Site C project and the oversight of a BC Hydro fund surplus as well.

"A one year rate freeze costs Hydro $150 million," Redies said. "That means there's $150 million less to invest in capital projects and other investments that the utility needs to make."

"This is putting off decisions that should be made today to the future."

Recommendations from the review — including possible new rates — will be implemented starting in April 2019.

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NT Power OEB Compliance Penalty highlights a $75,000 fine for improper disconnection notices, 14-day rule violations, process oversight failures, refunds, LEAP support, and corrective training to strengthen consumer protection and regulatory adherence in Ontario areas.

Key Points

A $75,000 OEB fine to NT Power for improper disconnection notices; refunds, LEAP support, and improved compliance.

✅ $75k administrative monetary penalty; $25k LEAP donation; refunds

✅ 870 notices misdated; 14-day rule training implemented

✅ 10 disconnects reconnected; $100 goodwill credits

The Ontario Energy Board recently ruled against Newmarket-Tay Power Distribution Ltd. (NT Power), fining them $75,000 for failing to issue timely disconnection notices to 870 customers between April and August 2022. These notices did not comply with the Ontario Energy Board's distribution system code, similar to standards reaffirmed in the OEB decision on Hydro One rates earlier this year, which mandates a minimum 14-day notice period before disconnection.

Out of the affected customers, ten had their electricity services disconnected, and six were additionally charged reconnection fees. However, NT Power has since reconnected all disconnected customers and refunded the reconnection fees, as confirmed by the Ontario Energy Board.

In response to these issues, NT Power has voluntarily accepted an assurance of compliance. This agreement stipulates that NT Power will pay a $75,000 administrative monetary penalty. Furthermore, they will make an additional payment of $25,000 to the Salvation Army's Northridge Community Church, which administers the Low-income Energy Assistance Program (LEAP) within NT Power's service area, aligning with broader efforts to reduce costs for industry highlighted by Canadian Manufacturers & Exporters recently, according to the association.

This is not the first time NT Power has faced compliance issues in this regard. The utility company admitted that this incident marks the second instance in three years where they failed to adhere to their disconnection-related obligations as outlined in the code, and sector governance debates, including the Manitoba Hydro board debate, underscore how oversight remains a national focus.

In a statement to NewmarketToday, NT Power acknowledged a similar issue three years ago when they were alerted to problems with their disconnection process. They promptly made adjustments to align their in-house procedures with the requirements of the Ontario Energy Board. Unfortunately, they neglected to implement a secondary check, leading to disconnect notices being dated a few days too early.

Alex Braletic, NT Power's Vice President of Engineering and Operation, clarified that no customers were actually disconnected prematurely, and debates over paying for electricity in India illustrate how enforcement challenges differ globally, but the issued letters contained inaccuracies. He added that NT Power has since instituted additional verification procedures to prevent such errors from occurring again.

The Ontario Energy Board emphasized that NT Power has assured them that corrective measures have been taken to ensure that their staff involved in the disconnection process receive proper training and management oversight, and recent market reactions such as Hydro One shares falling after leadership changes underscore the importance of strong governance to guarantee compliance with regulatory requirements.

Brian Hewson, Vice President of Consumer Protection and Industry Performance at the Ontario Energy Board, stated, referencing earlier Ontario rate reductions for businesses that complemented consumer protections, "As a result of the actions we have taken and NT Power’s assurance that it is aware of its obligations and has taken steps to improve its processes, consumers will be better protected."

Braletic encouraged NT Power's customers who are facing difficulties paying their electricity bills to reach out to their customer service department or visit their website. He emphasized that various programs and services are available to provide relief for bills, and amid ongoing Toronto Hydro impersonation scams customers should contact NT Power directly. NT Power is committed to collaborating with customers proactively and connecting them with assistance to avoid serving them with disconnection notices.

Furthermore, NT Power plans to send a letter to the ten affected customers and provide each of them with a $100 bill credit as a goodwill gesture.

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