Biosphere reserves are areas of terrestrial and coastal ecosystems promoting solutions to reconcile the conservation of biodiversity with its sustainable use. Four-biosphere reserves of India, which have been included in the world network of biosphere reserves are:-
(i) The Sunderbans in the West Bengal
(ii) Nanda Devi in Uttranchal
(iii) The Gulf of Mannar in Tamil Nadu
(iv) Nilgiris of Kerala, Karnataka and Tamil Nadu