The fast dwindling $....A... $$\;\%$ forest is estimated to produce $....B... $$\;\%$ percent of the total oxygen in earth’s atmosphere.
$A -$ Siberian, $B -30$
$A -$ Temperate, $B -20$
$A -$ Alpine, $B -15$
$A -$ Amazon, $B -20$
The type of conservation in which the threatened species are taken out from their natural habitat and placed in special setting where they can be protected and given special care is called
Give differences : National Park and Sanctuary
World summit on sustainable development was held in
The Earth Summit held in Rio de Janeiro in $1992$ was called