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

Loss of forest,urbanization,and increasing pollution are all due to:

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.

Ecological backlash (or Ecological Boomerang) is:

The $Chipko$ movement was started for the protection of .........

Jhum cultivation:
$I.$ Also called as slash and burn agriculture,is the farming practice in North Eastern states of India.
$II.$ Farmers cut down the trees of forest and burn the plant remains.
$III.$ The ash is used as a fertilizer and the land is then used for farming or cattle grazing.
$IV.$ After cultivation,the land is left for several years,so as to allow its recovery.
Which of the statements given above are correct about Jhum cultivation?