Any undesirable change in physical, chemical or biological characteristics of air, land, water or soil is called?
Greenhouse effect
Solid wastes
Pollution
Deforestation
The part of the Himalayas between Tista and Dihang rivers is known as .......... Himalayas.
Nepal
Kashmir
Assam
Jammu
The northern plain of India is formed of ...............
metamorphic soil
igenous rocks
alluvial soil
old crystalline rocks
According to an estimate, almost ................. percent forests have been lost in the tropics, compared to only 1 percent in the temperate region.
20
40
60
80
Beyond the ............., the Himalayas bend sharply to the south and spread along the eastern boundary of India.
Zoji La Pass
Dihang gorge
Bhutan border
Nepal border