text: Everyone knows that cars emit greenhouse gases and it's oh so bad for the environment and blah blah blah, and we all care. We really do. But do we care enough to give up our cars? Most likely not. But we could all stand to limit our driving, and it's easy enough. If the grocery store is only a few blocks away how about riding your bike or walking? You'll get a little exercise and a little less pollution. And while you're taking this walk, imagine the silence you would hear if everybody else was also doing this and the streets were empty. "The swish of bicycles and the chatter of wandering children drown out the occasional distant motor." (Source 1). Aside from just the noise pollution our buzzing motors give us, the air pollution is much worse. Cars are responsible for twelve percent of greenhouse gases in Europe and fifty percent in some North American cities (Source 1). Beijing, China, the most polluted city in the world (Source 2) which is known for its intense smog, was almost shown up by the capital of France. Since Paris' government favors diesel over gasoline, they know exactly what was to blame. Closer to home, America's second largest source of greenhouse gas emissions is due to the transportation industry (Source 4).