It like people don't understand electricity comes from burning natural gas,  coal or trash in city power plants.  Last I saw the largest reasons for co2 emissions were 1. The generation of electricity 2. Manufacturing and production 3. Volcanoes and nature. Unless this changed a lot cars aren't even a big deal. Get China and India to reduce co2 since those 2 countries account for over half the world's pollution.,(reply>), You still have so much to learn.