Chipko movement started in

Which one of the following is the central theme of the Chipko Movement, started by Sunderlal Bahuguna in 1973 ?

Which one of the following is the central theme of the Chipko Movement, started by Sunderlal Bahuguna in 1973?

Chipko movement was started by

Chipko movement was started by

Chipko movement was started to conserve

First Chipko movement was started by

Where did the Chipko movement start? What are Dobson units?