First national park established in India is Jim Corbett National Park in Uttarakhand (established in 1936).
People who took an active roles in the Chipko movement are Gaura Devi, Sudesha Devi, Bachni Devi, Chandi Prasad Bhatt, Sundarlal Bahuguna, Govind Singh Rawat, Dhoom Singh Negi, Shamsher Singh Bisht and Ghanasyam Raturi.
The main cause of over-exploitation of natural resources is increasing demands and needs of people and also increasing urbanization and industrialization.