Do you have a “charcoal-powered” power plant at your house? Or do you use the power grid like everyone else, which is a mix of sources that is gradually migrating to clean energy?
If you had a fossil-fuel powered car, you would definitely burn fossil fuels to go anywhere. And every time you used the brakes, none of that energy would be re-captured.
Suggesting that electric cars are bad because they might use some amount of fossil-fuel produced energy is a really bad false equivalency, and missing the point of electric cars.