text: So all in all, we depend on cars for daily purposes and it may seem hard to let go of your keys and walk, but if we all do that every once in a while it can lead to tremendous benefits. Imagine if you could walk outside and see people walking and enjoying themselves, not having to worry about gas prices or traffic jams. Imagine if we didn't have to worry about greenhouse gases or smog. Going for walk instead of driving may not seem like much, but it has major impacts on a multitude of things.         Dear Principal,