We only have one planet, and that is Earth. So until scientists find another habitable planet, it is our job to keep Earth clean, healthy, and livable. A dirty environment means more diseases, and that's bad news. I don't understand why people litter, because they only have one home, and they're taking it for granted. So two things: if you are a litterer, then stop! You're only harming yourself. If you don't litter, good, and stay like that. Help people who do litter to stop. We can clean up Earth, so go for it!
where my imagination takes flight.