Dog poop left on the ground does not fertilize the ground or just magically disappear. It is picked up by storm water runoff and runs into storm drains that ultimately empty into the Chesapeake Bay. This water is not treated or cleaned before it enters the bay, so pet waste is a significant contributor to water pollution. It also presents health risks to humans and pets. Pet waste carries bacteria, viruses, and parasites that can make people, especially children, sick. YOU can make a difference by making this pledge and encouraging others to make it too!