title: Down to earth.
mesh_terms: D000383:Agriculture / Q000639:trends; D055868:Floods; D005523:Food Supply; D005580:Fossils; D019015:Geologic Sediments / Q000737:chemistry; D006040:Goals; D006801:Humans; D061329:Oil and Gas Fields / Q000737:chemistry; D012987:Soil / Q000737:chemistry*
chemical_list: D012987:Soil