You’ve heard of food deserts, areas where healthy and nutritious food is all but impossible to find. But now experts are concerned about another public health problem: play deserts. Play deserts are areas where parks and other spots to run around and play are nonexistent, hard to access or in less safe locations that make parents second-guess taking their children to play there. And a new study from the University of Georgia found that hundreds of U.S. counties fit into that category.