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.
County Number 44 on Alabama Licence Plates Limestone County is a county of the U.S. state of Alabama. As of the 2010 census, the county's population was 82,782. Its county seat is Athens. Its name comes from Limestone Creek, a local stream. Limestone County is included in the Huntsville, AL Metropolitan Statistical Area.