You can’t make a broad statement that because of your local grid, the vehicle is not zero emissions. That’s what trolls and shorts do. I live in Alberta where 80% of the grid is coal fired. My car will be as close to zero emission as you can get, powered only by solar. If the engineer working at the hydro plant drives an ice car to work, is hydro zero emissions? It’s pointless to talk about grid sources because these cars have the ability to be as close to zero emission as possible. These electric cars (not only Tesla), are the beginning of good things. As these cars become more commonplace, more and more people will power their vehicles with solar, and solar will get less and less expensive. In the meantime they make the grids more efficient, saving energy.