Even if enough renewable energy is available, simply switching from gas-powered cars to electric vehicles (EVs) won’t be enough to fight climate change—unless the U.S. also upgrades its transmission grid, a new Northwestern University study finds.
If every gas-powered vehicle in the U.S. were replaced by an EV, transmission constraints would prevent the cleanest available electricity from reaching many charging locations. This “grid congestion” would force greater reliance on nearby fossil fuel power plants, undercutting the emissions benefits of electrification.
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