Litter is trash such as cigarette butts, food wrappers, bottles and cans that are improperly discarded on the ground, along roads, or in bodies of water. Litter pollutes water sources and harms wildlife by causing animals to choke or become entangled. It also spreads germs and diseases by attracting pests. Litter is bad for the environment because it wastes natural resources, and when recyclable materials are discarded they require new resources to replace them.