greenbelt

Thoothukudi, Tuticorin, Sterlite copper, copper smelting, chimney stack, greenbelt, environmental impact assessment, air quality index, sulphur dioxide, SIPCOT industrial estate, SIPCOT, Tamil Nadu Pollution Control Board, National Air Monitoring Program,

Tuticorin Air Quality Improves Noticeably After Sterlite Closure: TNPCB Data