Litter is not only an eyesore but a serious threat to animals and their habitats. We can all work together to keep the planet healthy and clean. Did you know that gum on the sidewalk is litter? Even a banana peel that is thrown in a ditch is litter. Trash poses a threat to animals everywhere, including pets, farm animals and wildlife. They can get injured or trapped in the litter and even eat garbage that makes them sick.