against those of a gas-powered vehicle, you’ll need to start by looking at the composition of the electrical grid. Nationally, the grid is roughly 40 percent coal, 25 percent natural gas, 20 percent nuclear power, and about 10 percent renewable sources, led by hydroelectricity. So it’s fair to say that your average Tesla is powered in large part by burning fossil fuels. Tesla acknowledges this, and insists that its cars are still far cleaner than their internal-combustion competitors. That’s because…
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