Electric vehicles emit zero exhaust pollution and do not pollute their immediate environment.
Renewable energy can be used to recharge batteries giving a zero effect on global pollution as well.
EVs also reduce noise pollution.
"....every gallon of gasoline your vehicle burns puts 20 pounds of carbon dioxide (CO2) into the atmosphere. Scientific evidence strongly suggests that the rapid build-up of CO2 and other greenhouse gases in the atmosphere is raising the earth's temperature and changing the earth's climate with potentially serious consequences."