Exposure to UV radiation reduce the life span of different synthetic material like…………
a) plastic
b) nylon
c) both a & b
d) none of these
…………can do a lot in combating ozone layer depletion.
a) buying and using recycled product
b) saving of energy
c) using of public transport
d) all of these
Global Warming:-
Global warming is the increase in average …………of the earth’s surface (both land and water) as well as its temperature.
a) pressure
b) volume
c) temperature
d) none of these
Green house gases are mostly produced by human activities such as…………
a) burning of fossil fuel
b) deforestation
c) both a & b
d) none of these
Global warming is caused by……………the concentration of green house gases.
a) increasing
b) decreasing
c) maintain
d) stop
