1. The process by which fertile land becomes desert due to inappropriate agriculture, deforestation, and drought is termed as desertification. It is a type of land degradation which lead to the extension of desert area.
2. In Tamil Nadu Theni, the Nilgiris and Kanyakumari are the worst affected districts by desertification.
3. About 12,000 hectares (120 sq. km) were affected by sand deposition in Theni and Rajapalayam.