Survey conducted by WAPDA has revealed that 2.0 M ha of land have become severely waterlogged affecting a population of million:
A.3.4
B.4.4
C.5.5
D.6.5
Category: Importance of Trees Mcqs
Trees play an important role in:
A.Supply of clean air
B.They absorb carbon-dioxide from the atmosphere and release oxygen
C.Both (a) & (b)
D.None of these
