Study environmental pollution, waste treatment and ecosystem protection. According to official website of Hunan Agricultural University, the safety engineering direction of Hunan Agricultural University is to study environmental safety issues such as environmental pollution, waste disposal, ecosystem protection and water resources management. Hunan Agricultural University, referred to as "Hunan Agricultural University", is located in Changsha City, Hunan Province. It is a university jointly founded by the people of China, the Ministry of Agriculture and Rural Affairs and the Hunan Provincial People's Government.