Natural gas consists primarily of…………
a) C
b) CO2
c) CH
d) CH4
The Sui is located at a distance of
about …….from Karachi in Dera Bugti, Baluchistan.
a) 520 km
b) 560 km
c) 610 km
d) 650 km
Wind has been used as a source of energy for centuries about ………..ago.
a) 3000 BC
b) 4000 BC
c) 5000 BC
d) 6000 BC
Windmills were used in Europe more than … ago to grind grains and pump water.
a) 500 years
b) 700 years
c) 900 years
d) 1100 years
…………..systems make use of the energy in running water to create electricity.
a) wind
b) hydroelectric
c) solar
d) none of these
Burning of fossil fuel causes:
a) air pollution
b) global warming
c) both a and b
d) none of these
