Everyone does it and so do our pets. When walking your dog, please pick up with a biodegradable poop bag so your dog's waste doesn't live in a landfill taking up to 100 years to decompose. You can buy biodegradable bags at your local pet store or online. And cat owners should steer clear of clumping clay litters. The clay is strip-mined, which is harmful to the environment and the clay sediment contains carcinogenic silica dust that your cat can ingest. For more pet tips, check here.