text: Autonomous cars would not only be a safer alternative to human driving, but a more fuel eficient, and therefore, greener alternative. According to Google cofounder Sergey Brin, autonomous cars would be twice as fuel efficient as today's taxis and buses. With more fuel efficient cars, pollution due to carbon dioxide emmisions will drastically decrease. Fuel efficient cars also help the American economy because if cars are using half as much gasoline, then we only have to import half as much oil, which will save us money as a country.