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.
The consolidated government was formed by the City of Athens and Clarke County, and is governed the the Athens-Clarke County Unified Government. The Official Web Site is located at http://www.athensclarkecounty.com/ . The 2014 population estimate is 120,938 and the 2010 census population was 116,707.