text: All in all, we should limit car usage because if we can use cars less than we do, it will ease stress, reduce greenhouse gas, and finally clean the earth. What do you say, use your car less and get some exersize? Thanks for reading my fellow citizens.    Driverless cars seem to be extremely close to releasing to the public. Many companies have been working on driverless cars for years. These cars have great potential to change the world of transportation. The cars have positive and negative aspects, but I believe that driverless cars will be a positive effect on the world.