Nobody likes to clean up after their dog when they're taking a walk, but most of the time you're forced to do it at public parks. So if you're using a doggy bag anyway, you might as well try to find one that's environmentally-friendly. Some stores actually have bags that are made out of cornstarch. That's important because they decompose much faster in a landfill compared to regular plastic bags. The only problem is, eco-friendly bags are more expensive and they're pretty difficult to find in our local stores.