text: All of these countries have come up with some amazing ways to stop the use of cars in there countries. From Colombia, to Germany, and Paris they have made it easier for there citizens to stop using cars and take another way that won't pollot the air or make "smog" as some countries call it. So lets see if America can be the next countrie to join the movement, it could be by riding bikes, walking or car pooling!    I do not think there are alien's in Mars or any other planet . I think there are no aliens because astronauts have to have tanks filled with specialized air thats on Earth !