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.
Columbiana County is a county located in the U.S. state of Ohio. As of the 2010 census, the population was 107,841. The county seat is Lisbon. The county name is derived from the explorer of the Americas, Christopher Columbus. Columbiana County comprises the Salem, Ohio Micropolitan Statistical Area, which is also included in the YoungstownâWarren, OH-PA Combined Statistical Area.