Why Electric Vehicles Are "Greener" Than Ever In All 50 States

Tidal Energy harnesses ocean currents with tidal turbines to deliver predictable, renewable power. From Scotland's Orkney to New York's East River, clean baseload electricity complements wind and solar in decarbonizing grids.

Key Points

Tidal energy uses underwater turbines to capture predictable ocean currents, delivering reliable, low-carbon power.

✅ Predictable 2-way flows enable forecastable baseload

✅ Higher energy density than wind, slower flow speeds

✅ Costs remain high; scaling and deployment are challenging

As the world looks to curb climate change and reduce fossil fuel emissions, some companies are focusing on a relatively untapped but vast and abundant source of energy — tidal waves.

On opposite sides of the Atlantic, two firms are working to harness ocean currents in different ways to try to generate reliable clean energy.

Off the coast of Scotland, Orbital Marine Power operates what it says is the "most powerful tidal turbine in the world." The turbine is approximately the size of a passenger airplane and even looks similar, with its central platform floating on the water and two wings extending downwards on either side. At the ends of each wing, about 60 feet below the surface, are large rotors whose movement is dictated by the waves.

"The energy itself of tidal streams is familiar to people, it's kinetic energy, so it's not too dissimilar to something like wind," Andrew Scott, Orbital's CEO, told CNN Business. "The bits of technology that generate power look not too different to a wind turbine."

But there are some key differences to wind energy, primarily that waves are far more predictable than winds. The ebb and flow of tides rarely differs significantly and can be timed far more precisely.

Orbital Marine Power's floating turbines off the Scottish coast produce enough energy to power 2,000 homes a year, while another Scottish tidal project recently produced enough for nearly 4,000 homes.

Orbital Marine Power's floating turbines off the Scottish coast produce enough energy to power 2,000 homes a year.

"You can predict those motions years and decades [in] advance," Scott said. "But also from a direction perspective, they only really come from two directions and they're almost 180 degrees," he added, unlike wind turbines that must account for wind from several different directions at once.

Tidal waves are also capable of generating more energy than wind, Scott says.

"Seawater is 800 times the density of wind," he said. "So the flow speeds are far slower, but they generate far more energy."

The Orbital turbine, which is connected to the electricity grid in Scotland's Orkney, can produce up to two megawatts — enough to power 2,000 homes a year — according to the company.

Scott acknowledges that the technology isn't fully mainstream yet and some challenges remain including the high cost of the technology, but the reliability and potential of tidal energy could make it a useful tool in the fight against climate change, as projects like Sustainable Marine in Nova Scotia begin delivering power to the grid.

"It is becoming increasingly apparent that ... climate change is not going to be solved with one silver bullet," he said.

'Could be 24/7 power'
Around 3,000 miles away from Orbital's turbines, Verdant Power is using similar technology to generate power near Roosevelt Island in New York City's East River. Although not on the market yet, Verdant's turbines set up as part of a pilot project help supply electricity to New York's grid. But rather than float near the surface, they're mounted on a frame that's lowered to the bottom of the river.

"The best way to envision what Verdant Power's technology is, is to think of wind turbines underwater," the company's founder, Trey Taylor, told CNN Business. And river currents tend to provide the same advantages for energy generation as ocean currents, he explained (though the East River is also connected to the Atlantic).

"What's nice about our rivers and systems is that could be 24/7 power," he said, even as U.S. offshore wind aims to compete with gas. "Not to ding wind or solar, but the wind doesn't always blow and the sun doesn't always shine. But river currents, depending on the river, could be 24/7."

Verdant Power helps supply electricity to New York City
Over the course of eight months, Verdant has generated enough electricity to power roughly 60 homes — though Taylor says a full-fledged power plant built on its technology could generate enough for 6,000 homes. And by his estimate, the global capacity for tidal energy is enormous, with regions like the Bay of Fundy pursuing new attempts around Nova Scotia.

A costly technology
The biggest obstacle to reaching that goal at the moment is how expensive it is to set up and scale up tidal power systems.

"Generating electricity from ocean waves is not the challenge, the challenge is doing it in a cost-effective way that people are willing to pay for that competes with ... other sources of energy," said Jesse Roberts, Environmental Analysis Lead at the US government-affiliated Sandia National Laboratories. "The added cost of going out into the ocean and deploying in the ocean... that's very expensive to do," he added. According to 2019 figures from the US Department of Energy, the average commercial tidal energy project costs as much as $280 per megawatt hour. Wind energy, by comparison, currently costs roughly $20 per megawatt hour and is "one of the lowest-priced energy sources available today," with major additions like the UK's biggest offshore wind farm starting to supply the grid, according to the agency.

When operational, the Orbital turbine's wing blades drop below the surface of the water and generate power from ocean currents.

When operational, the Orbital turbine's wing blades drop below the surface of the water and generate power from ocean currents.

Roberts estimates that tidal energy is two or three decades behind wind energy in terms of adoption and scale.

The costs and challenges of operating underwater are something both Scott and Taylor acknowledge.
"Solar and wind are above ground. It's easy to work with stuff that you can see," Taylor said. "We're underwater, and it's probably easier to get a rocket to the moon than to get these to work underwater."
But the goal of tidal power is not so much to compete with those two energy sources as it is to grow the overall pie, alongside innovations such as gravity power that can help decarbonize grids.

"The low hanging fruit of solar and wind were quite obvious," Scott said. "But do they have to be the only solution? Is there room for other solutions? I think when the energy source is there, and you can develop technologies that can harness it, then absolutely."
 

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UK Renewable Energy Milestones: wind outpacing gas, record solar output, offshore wind growth, National Grid data, and a net-zero grid by 2035, despite planning reforms, connection queues, and grid capacity constraints.

Key Points

Key UK advances where wind beat gas, solar set records, and policies target a 2035 net-zero electricity grid.

✅ Wind generated one-third of electricity, outpacing gas

✅ Record solar output reported by National Grid in April

✅ Onshore wind easing via planning reforms; grid delays persist

In the first three months of this year a third of the country's electricity came from wind farms, with the UK leading the G20 for wind power according to research from Imperial College London has shown.

National Grid has also confirmed that April saw a record period of solar energy generation, and wind generation set new records earlier in the year.

By 2035 the UK aims for all of its electricity to have net zero emissions, though progress stalled in 2019 in some areas.

"There are still many hurdles to reaching a completely fossil fuel-free grid, but wind out-supplying gas for the first time, a sign of wind leading the power mix, is a genuine milestone event," said Iain Staffell, energy researcher at Imperial College and lead author of the report.

The research was commissioned by Drax Electrical Insights, which is funded by Drax energy company.

The majority of the UK's wind power has come from offshore wind farms, and wind generated more electricity than coal in 2016 marking an early shift. Installing new onshore wind turbines has effectively been banned since 2015 in England.

Under current planning rules, companies can only apply to build onshore wind turbines on land specifically identified for development in the land-use plans drawn up by local councils. Prime Minister Rishi Sunak agreed in December to relax these planning restrictions to speed up development.

Scientists say switching to renewable power is crucial to curb the impacts of climate change, with milestones like wind and solar topping nuclear underscoring the shift, which are already being felt, including in the UK, which last year recorded its hottest year since records began.

Solar and wind have seen significant growth in the UK. In the first quarter of 2023, 42% of the UK's electricity came from renewable energy, with 33% coming from fossil fuels like gas and record-low coal shares.

Some new solar and wind sites are waiting up to 10 to 15 years to be connected because of a lack of capacity in the electricity system.

And electricity only accounts for 18% of the UK's total power needs. There are many demands for energy which electricity is not meeting, such as heating our homes, manufacturing and transport.

Currently the majority of UK homes use gas for their heating - the government is seeking to move households away from gas boilers and on to heat pumps which use electricity.

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US electric vehicle momentum is slowing as tax credits expire, tariffs increase costs, and interest rates rise, while Europe and China accelerate EV adoption through stronger incentives, enhanced charging infrastructure, and growth in battery manufacturing.

Why has US Electric Vehicle Momentum Slowed as Globe Surges?

US electric vehicle momentum has slowed due to expiring subsidies, rising costs, and global competition from faster-moving markets.

✅ End of federal tax credits weakened buyer demand

✅ Tariffs and high interest rates raised EV prices

✅ Europe and China expanded incentives and infrastructure

You could be forgiven for thinking that electric cars might finally be gaining momentum in the United States. Last year, battery-powered vehicle sales topped 1.2 million—more than five times the number sold just four years earlier, amid an early-2024 EV surge in deliveries. Hybrid sales tripled over the same period, and in August, battery cars accounted for 10 percent of all new vehicle sales, a record high according to S&P Global Mobility.

Major automakers, including General Motors, Ford, and Tesla, reported record electric-vehicle deliveries this quarter, a rare bright spot in an industry still contending with high interest rates, inflation, and tariffs, and a sign the age of electric cars is arriving.

Yet analysts warn the apparent boom may be short-lived, noting a market share dip in early 2024 that could foreshadow slower growth. Much of the recent surge was driven by buyers rushing to take advantage of a federal subsidy worth up to $7,500 per vehicle—a credit that expired at the end of September. Without it, automakers expect demand to dip sharply.

"It's going to be a vibrant industry, but it's going to be smaller, way smaller than we thought," Ford CEO Jim Farley said Tuesday. General Motors’ CFO Paul Jacobson echoed that concern: "I expect that EV demand is going to drop off pretty precipitously," he told a conference last month.

Even with those gains, the US—still the world’s second-largest car market—remains a laggard compared with global peers, where global EV adoption has accelerated rapidly. Electric and hybrid vehicles accounted for nearly 30 percent of new sales in the UK last year and approximately one in five across Europe. In China, electric models accounted for almost half of all car sales in 2023 and are expected to become the majority this year, according to the International Energy Agency.

Analysts say policy differences largely explain the gap. Other regions have offered stronger incentives, stricter emissions rules, and more aggressive trade-in programs. President Joe Biden tried to close the gap, tightening emissions standards, offering loans for EV investments, and spending billions on charging networks while expanding the $7,500 credit. His goal was to have half of all US vehicle sales be electric by 2030.

Supporters argue that such measures are crucial to keeping American carmakers competitive with Chinese and European manufacturers. But former President Donald Trump, who recently dismissed climate change as a "con job," has vowed to roll back many of those initiatives, echoing arguments that the EV revolution is overstated by proponents. "We're saying ... you're not going to be forced to make all of those cars," Trump said this summer, while signing a bill to strike down California’s plan to phase out gasoline-only car sales by 2035. "You can make them, but it'll be by the market, judged by the market."

Although EVs have become cheaper, they still cost more than comparable gasoline models, and sales remain behind gas cars in most segments. The average US electric car sold for approximately $57,000 in August, which is roughly 16 percent higher than the overall average, according to Kelley Blue Book.

Chinese EV giants such as BYD have been blocked from the US market by tariffs supported by both Biden and Trump, further limiting price competition. Automakers now face the twin challenges of rising tariffs and disappearing subsidies.

"It would have been difficult enough if all you had to deal with were new tariffs, but with new tariffs and the incentive going away, there are two impacts," said Stephanie Brinley of S&P Global Mobility.

Researchers warn that the policy shift could further reduce EV investment. "It's a big hit to the EV industry—there's no tiptoeing around it," said Katherine Yusko of the American Security Project. "The subsidies were initially a way to level the playing field, and now that they're gone, the US has a lot of ground to make up."

Still, Brinley urged caution before declaring the race lost, even as some argue EVs have hit an inflection point in adoption. "Is [electric] really the right thing?" she asked. "Saying that we're behind assumes that this is the only and best solution, and I think it's a little early to say that."

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Canada 2035 Zero-Emission Vehicle Mandate sets EV sales targets, raising concerns over affordability, battery materials like lithium and copper, charging infrastructure, grid capacity, renewable energy mix, and policy impacts across provinces.

Key Points

Mandate makes all new light-duty vehicles zero-emission by 2035, affecting costs, charging, and electric grid planning.

✅ 100% ZEV sales target for cars, SUVs, light trucks by 2035

✅ Cost pressures from lithium, copper, nickel; EVs remain pricey

✅ Grid, charging build-out needed; impacts vary by provincial mix

Whether or not you want one, can afford one or think they will do essentially nothing to stop global warming, electric vehicles are coming to Canada en masse. This week, the Canadian government set 2035 as the “mandatory target” for the sale of zero-emission SUVs and light-duty trucks as part of ambitious EV goals announced by Ottawa.

That means the sale of gasoline and diesel cars has to stop by then. Transport Minister Omar Alghabra called the target “a must.” The previous target was 2040.

It is a highly aspirational plan that verges on the delusional according to skeptics of an EV revolution who argue its scale is overstated, even if it earns Canada – a perennial laggard on the emission-reduction front – a few points at climate conferences. Herewith, a few reasons why the plan may be unworkable, unfair or less green than advertised.

Liberals say by 2035 all new cars, light-duty trucks sold in Canada will be electric, as Ottawa develops EV sales regulations to implement the mandate.

Parkland to roll out electric-vehicle charging network in B.C. and Alberta

Sticker shock: There is a reason why EVs remain niche products in almost every market in the world (the notable exception is in wealthy Norway): They are bloody expensive and often in short supply in many markets. Unless EV prices drop dramatically in the next decade, Ottawa’s announcement will price the poor out of the car market. Transportation costs are a big issue with the unrich. The 2018 gilets jaunes mass protests in France were triggered by rising fuel costs.

While some EVs are getting cheaper, even the least expensive ones are about double the price of a comparable product with an internal combustion engine. Most EVs are luxury items. The market leader in Canada and the United States is Tesla. In Canada the cheapest Tesla, the Model 3 (“standard range plus” version), costs $49,000 before adding options and subtracting any government purchase incentives. A high-end Model S can set you back $170,000.

To be sure, prices will come down as production volumes increase. But the price decline might be slow for the simple reason that the cost of all the materials needed to make an EV – copper, cobalt, lithium, nickel among them – is climbing sharply and may keep climbing as production increases, straining supply lines.

Lithium prices have doubled since November. Copper has almost doubled in the past year. An EV contains five times more copper than a regular car. Glencore, one of the biggest mining companies, estimated that copper production needs to increase by a million tonnes a year until 2050 to meet the rising demand for EVs and wind turbines, a daunting task given the dearth of new mining projects.

Will EVs be as cheap as gas cars in a decade or so? Impossible to say, but given the recent price trends for raw materials, probably not.

Not so green: There is no such thing as a zero-emission vehicle, even if that’s the label used by governments to describe battery-powered cars. So think twice if you are buying an EV purely to paint yourself green, as research finds they are not a silver bullet for climate change.

In regions in Canada and elsewhere in the world that produce a lot of electricity from fossil-fuel plants, driving an EV merely shifts the output of greenhouse gases and pollutants from the vehicle itself to the generating plant (according to recent estimates, about 18% of Canada’s electricity comes from coal, natural gas and oil; in the United States, 60 per cent).

An EV might make sense in Quebec, where almost all the electricity comes from renewable sources and policymakers push EV dominance across the market. An EV makes little sense in Saskatchewan, where only 17 per cent comes from renewables – the rest from fossil fuels. In Alberta, only 8 per cent comes from renewables.

The EV supply chain is also energy-intensive. And speaking of the environment, recycling or disposing of millions of toxic car batteries is bound to be a grubby process.

Where’s the juice?: Since the roofs of most homes in Canada and other parts of the world are not covered in solar panels, plugging in an EV to recharge the battery means plugging into the electrical grid. What if millions of cars get plugged in at once on a hot day, when everyone is running air conditioners?

The next few decades could emerge as an epic energy battle between power-hungry air conditioners, whose demand is rising as summer temperatures rise, and EVs. The strain of millions of AC units running at once in the summer of 2020 during California’s run of record-high temperatures pushed the state into rolling blackouts. A few days ago, Alberta’s electricity system operator asked Albertans not to plug in their EVs because air conditioner use was straining the electricity supply.

According to the MIT Technology Review, rising incomes, populations and temperatures will triple the number of air conditioners used worldwide, to six billion, by mid-century. How will any warm country have enough power to recharge EVs and run air conditioners at the same time? The Canadian government didn’t say in its news release on the 2035 EV mandate. Will it fund the construction of new fleets of power stations?

The wrong government policy: The government’s announcement made it clear that widespread EV use – more cars – is central to its climate policy. Why not fewer cars and more public transportation? Cities don’t need more cars, no matter the propulsion system. They need electrified buses, subways and trains powered by renewable energy. But the idea of making cities more livable while reducing emissions is apparently an alien concept to this government.

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Offshore Wind Vessel Charging System enables renewable energy offshore charging from wind turbines, delivering clean power to electric vessels and crew transfer ships, boosting range, safety, and net zero maritime operations with reliable, efficient infrastructure.

Key Points

A turbine-mounted offshore charger delivering renewable power to electric vessels, extending range and improving safety.

✅ Turbine-mounted, field-proven offshore charging interface

✅ Delivers 100% renewable electricity to electric vessels

✅ Accelerates net zero, cuts maritime fossil fuel use

An offshore charging system will power vessels with 100% renewably generated electricity from wind turbines, aligning with projects like battery-electric high-speed ferries now advancing in the United States.

The system, developed by Teesside marine electrical engineering firm MJR Power and Automation, will be presented at the Global Offshore Wind event in Manchester (21-22 June), alongside interest in EV energy storage for buildings that could complement offshore charging solutions.

Known as the Offshore Wind On-Turbine Electrical Vessel Charging System, MJR says the chargepoints will provide efficient, safe and reliable transfer of clean power for crew vehicles and other offshore support vessels, while emerging vehicle-to-grid capacity on wheels concepts highlight the wider role of electric fleets.

“This innovation will break down the existing range barriers and increase the uptake by vessel owners and operators, as demonstrated by electric ships on the B.C. coast moving to fully electric and green propulsion systems for retrofit and new-build vessels,” an announcement said.

“In combination with other field-proven technologies, the charging system will be an important part for government and offshore wind owners and operators to achieve their net zero maritime operations targets, and switch away from fossil fuels, complemented by port initiatives such as all-electric berth at London Gateway now under development. The ability to charge when in the field will significantly accelerate adoption of current emission-free propulsion systems, which will be a major asset for the decarbonisation of the global maritime sector.”

The firm recently announced that construction and in-house testing of the system had been completed. The development project was part of the Clean Maritime Demonstration Competition, funded by the Department for Transport and delivered in partnership with Innovate UK, reflecting wider interest in reversing the charge to the grid for resilient energy systems.

MJR electrical engineer Mohammed Latif said: “Our system will be absolutely crucial in helping governments to deliver on their net zero carbon targets, supported by plans like new UK-Europe interconnectors that strengthen clean energy supply, and I am looking forward to demonstrating how it works and the benefits it offers.”

As part of the project, MJR Power and Automation led a consortium of partners – Ore Catapult, Xceco, Artemis Technologies and Tidal Transit – that all provided expertise.

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Arizona Electric Vehicle Ownership is surging, led by EV adoption, charging stations growth, state incentives, and local manufacturers; yet rural infrastructure gaps and limited fast-charging plugs remain key barriers to convenient, statewide electrification.

Key Points

Arizona Electric Vehicle Ownership shows rising EV adoption and incentives, but rural fast-charging access still lags.

✅ 28,770 EVs registered; sixth per 1,000 residents statewide

✅ 385 fast chargers; 1,448 Level 2 plugs; many not 24/7

✅ Incentives: lower registration, HOV access, utility rebates

For a mostly red state, Arizona has a lot of blue-state company when it comes to states ranked by electric vehicle ownership, according to recent government data.

Arizona had 28,770 registered electric vehicles as of June, according to the U.S. Department of Energy's Alternative Fuels Data Center, the seventh-highest number among states. When ownership is measured per 1,000 residents, Arizona inches up a notch to sixth place, with just over four electric vehicles per 1,000 people.

That rate put Arizona just behind Oregon and Colorado and just ahead of Nevada and Vermont. California was in the lead by far, with California's EV and charging lead reflected in 425,300 registered electric vehicles, or one for every 10.7 residents.

Arizona EV enthusiasts welcomed the ranking, which they said they have seen reflected in steady increases in group membership, but said the state can do better, even amid soaring U.S. EV sales this year.

"Arizona is growing by leaps and bounds in major areas, but still struggling out there in the hinterlands," said Jerry Asher, vice president of the Tucson Electric Vehicle Association.

He and others said the biggest challenge in Arizona, as in much of the country, is the lack of readily available charging stations for electric vehicles.

Currently, there are 385 public fast-charging plugs and 1,448 non-fast-charging plugs in the state, where charging networks compete to expand access, said Diane Brown, executive director with the Arizona Public Interest Research Group Education Fund. And many of those "are not available 24 hours a day, often making EV charging less convenient to the public," she said.

And in order for the state to hit 10% EV ownership by 2030, one scenario outlined by Arizona PIRG, the number of charging stations would need to grow significantly.

"According to the Arizona PIRG Education Fund, to support a future in which 10% of Arizona's vehicles are EVs – a conservative target for 2030 – Arizona will need more than 1,098 fast-charging plugs and 14,888 Level 2 plugs," Brown said.

This will require local, state and federal policies, as EVs challenge state power grids, to make "EV charging accessible, affordable, and easy," she said.

But advocates said there are several things working in their favor, even as an EV boom tests charging capacity across the country today. Jim Stack, president of the Phoenix Electric Auto Association, said many of the current plug-ins charging stations are at stores and libraries, places "where you would stop anyway."

"We have a good charging infrastructure and it keeps getting better," Stack said.

One way Asher said Arizona could be more EV-friendly would be to add charging stations at hotels, RV parks and shopping centers. In Tucson, he said, the Culinary Dropout and Jersey Mike's restaurants have already begun offering free electric vehicle charging to customers, Asher said.

While they push for more charging infrastructure, advocates said improving technology and lower vehicle expenses are on their side, as post-2021 electricity trends reshape costs, helping to sway more Arizonans to purchase an electric vehicle in recent years.

"The batteries are getting better and lower in cost as well as longer-lasting," Stack said. He said an EV uses about 50 cents of electricity to cover the same number of miles a gas-burning car gets from a gallon of gas – currently selling for $3.12 a gallon in Arizona, according to AAA.

In addition, the state is offering incentives to electric vehicle buyers.

"In AZ we get reduced registration on electric vehicles," Stack said. "It's about $15 a year compared to $300-700 a year for gas and diesel cars."

Electric vehicle owners also "get 24/7 access to HOV lanes, even with one person," he said. And utilities like Tucson Electric Power offer rebates and incentives for home charging stations, according to a report by the National Conference of State Legislatures, and neighboring New Mexico's EV benefits underscore potential economic gains for the region.

Stack also noted that Arizona is now home to three eclectic vehicle manufacturers: Lucid, which makes cars in Casa Grande, Nikola, which makes trucks in Phoenix and Coolidge, and Electra Meccanica, which plans to build the three-wheeled SOLO commuter in Mesa.

"We get clear skies. No oil changes, no muffler work, no transmission, faster acceleration. No smog or smog tests," Stack said. "It's priceless."

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