The name of plant which can be used as biofuel is

The term used for the buildings that are build close to one another for reducing usage of land is called

A. decreasing capita space

B. increasing capita space

C. increasing density

D. decreasing density

The land area which can be used for farming is called

A. catchment land

B. derelict land

C. reclaimable land

D. arable land

The intensive cultivation on land by which soil fertility is destroyed and lost is called

A. desertification of land

B. cloud seeding of land

C. catchment of land

D. over cultivation of land

The percentage of land which is habitable and arable is

A. 10%

B. 12%

C. 30%

D. 50%

Out of 30% land of Earth's surface, the percentage of area which too cold to live is

A. 12%

B. 5%

C. 10%

D. 9%