Green house gases are…………
a) CO2
b) CH4
c) NO2& O3
d) all of these
…………allows the visible & UV rays from the sun to enter into atmosphere.
a) CO2, NO2
b) O3
c) CH4
d) all of these
The natural green house effect, maintains the earth’s…………at a safe level.
a) temperature
b) pressure
c) density
d) volume
The human activities have significantly enhanced the greenhouse effect causing the earth’ average…………to rise.
a) density
b) gravity
c) temperature
d) pressure
Global warming also cause…………
a) accelerating the melting of ice sheets
b) melting of ice on hills
c) melting of glaciers
d) all of these
Global warming is adversely affect the..……
a) climate
b) sea level
c) precipitation
d) all of these
