What is the year associated with the Chipko movement?

How many of the following processes result in the release of $CO_2$ into the atmosphere? Burning of wood,forest fires,photosynthesis,combustion of fossil fuels,decomposition of organic matter,volcanic activity.

Which of the following conferences obtained commitments from different countries for reducing overall greenhouse gas emissions to a level $5\%$ below $1990$ levels by $2008-2012$?

If an agricultural field is liberally irrigated for a prolonged period of time,it is likely to face the problem of:

Which of the following is $NOT$ true regarding the Bhopal Gas Tragedy?

Provide the full names for the following abbreviations:
$(i)$ $HFC$
$(ii)$ $CFC$