A generator attached to a wheel rotated by water power can produce

Protected water is supplied through 

To draw ground water from bore wells we use

The use of land for agriculture resulted in 

These cool the atmosphere

The excess of rain water flows into 

A pupa of a mosquito grows into 

The percentage of the earth's surface which is covered by water is 

Timely rainfall was due to

A water tanker can hold water upto several