Most autotrophs use water as the reducing agent, but some can use other hydrogen compounds such as hydrogen sulfide. Phototrophs (green plants and algae), a type of autotroph, convert electromagnetic energy from sunlight into chemical energy in the form of reduced carbon.
Athens is a city in and the county seat of Athens County, Ohio, United States. It is located along the Hocking River in the southeastern part of Ohio. A historic college town, Athens is home to Ohio University (26,000+ students) and is the principal city of the Athens, Ohio Micropolitan Statistical Area. The official population of Athens in the 2010 U.S. Census was 23,832.
Summit County is an urban county in the U.S. state of Ohio. As of the 2010 census, the population was 541,781 making it the fourth-most populous county in Ohio. Its county seat is Akron. The county was formed on March 3, 1840, from portions of Medina, Portage and Stark Counties.