text: Google cofounder Sergey Brin believes that driverless cars can replace public transportation such as taxis or busses. Major cities in the United States have the highest pollution globally and that is to blame the public transportation system along with many other things, but public transportation is one of the main factors. Sergey Brin envisions "a future with a public transportation system where fleets of driverless cars form a public-transport taxi system."(1). We do not know if this will be happening some time in the near future or years down the road. Sergey claims that the driverless cars would "use half the fuel of todays taxis and offer far more flexibility than a bus."(1). Well since we know that major cities usually have some sort of public transportation system now they are letting off huge amounts of pollution and using a lot of fuel each and every hour of the day. Something has to change Sergey Brin says he wants to cut the taxis and busses feul in half by using driverless vehicles instead. He states the vehicles would "offer far more flexibility than a bus."(1). We do not know what this statement means, but if it means that he can make driverless busses that recieve better fuel economy than a regular bus that is polluting the earth. That would be a really big improvement if he could accomplish that. Stopping global warmming should be a big topic of discussion and driverless cars could have a big impact on stopping global warmming.