Iceland

North Island of New Zealand

Yellow Stone National Park of USA

All of the above places

Sulphur dioxide

Freon

Nitrogen dioxide

Chlorine nitrate

Pichavaram

Pitara

Sundarbans

Bhitarkanika

Northen & North-East region

Southern region

Western Coast

Central region

Appennines

Tien Shan

Taurus

Zagros