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.
Athens and Clarke County combined to form a unified government in 1990. According to the 2010 U.S. census, AthensâClarke County had a population of 115,452 making it Georgia's fifth-largest city. Chosen in 1801 as the site for the first chartered state university in the nation, Athens is known for its culture and diversity.