Small quibble: Coal is down to 28% percent of US electrical generation, and will continue to be crowded out by solar, wind, and natural gas. Every one of the largest coal mining companies in the US are in bankruptcy. 98% of generation this year coming online is solar and wind.<p>Coal will be completely removed from generation in 5-10 years; natural gas in 15.<p>You <i>are</i> helping save the world by buying a Tesla; those 20-30% margins on the Model S and X are paying for the Supercharger network (which is required for mass adoption of EVs) and the Gigafactory (required to build out ~50GW&#x2F;year of energy storage for homes, utilities, and of course, vehicles).<p>Cars are not going away any time soon. Therefore, its best to make every effort to make them as clean as possible.