The One Problem with Extra-Large EVs Nobody's Talking AboutIn terms of environmental impact, bigger is not necessarily better.

Getting behind the wheel of new electric vehicles has become a signature move for self-proclaimed "car guy" President Joe Biden. But his choice of car has some climate advocates hitting the brakes.

Biden has spent his presidency touting the future ofelectric vehiclesand even taking a few for a spin, including theFord F-150 LightningandHummer EV.

Those EVs have one big thing in common: their batteries.

The Ford Lightning's batteryweighs 1,800 pounds, while the Hummer EV's 2,923-pound battery aloneweighs morethan a gasoline-powered Honda Civic. And that extra weight comes with some negative consequences.

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For starters, heavier cars mean more wear and tear on roads. The head of the National Transportation Safety Board has alsowarnedthat big EVs like the Hummer could increase the risk of serious injury or death for pedestrians and other drivers when they're in accidents.

Then there are the climate concerns. Bigger batteries require a lot of critical minerals, which, for the most part, areextracted using fossil fuel power. It also takes a lot more electricity to power those cars, and the electric grid still relies heavily on fossil fuels.

So while the Hummer EV may become better for the climate when more renewables come online, for now,it emits more carbon per milethan the most efficient gasoline-powered cars.

All these factors have led some climate advocates to call on the Biden administration and automakers tobuild and promote smaller EVs. But others would like to see federal funding go towardanotheroverlooked climate solution:public transit.