Ever wondered what makes the Earth healthy? How do scientists know when something is wrong? Become an Earth detective and uncover clues about troubles facing the Earth. Discover how scientists determine the health and quality of the water. Learn about plants and animals that warn us about trouble. Test out your sleuthing skills to find solutions to some of the Earth's problems and figure out some steps to help! The Illinois EPA, City of Springfield, and Lincoln Memorial Garden are partners for this event.