You could reduce CO2 emissions by driving. You could reduce them even more by walking. Did you know there's a walkable trail in the United States that stretches from Maine to Georgia called the Appalachian Trail? It's 2,190 miles long, and it's the longest hiking trail in the world. If you took the time to walk that trail from start to finish over several days, stopping only to sleep, you would get a lot of.exercise and earn a lot of.respect from a lot of people.
