re: I have been thinking about what causes people to litter.

They just don't care. And they aren't educated enough to realize that they should care. They think that trash on side of the road won't affect them. But it does. A states image has a lot to say about the potential workforce when companies are investigating moves. We have a lazy image, therefore we are forced to offer ridiculous tax breaks to entice new jobs to the state. People who don't care about their own home typically don't care about quality and productivity when they are working for you.