The major component of the atmosphere on Mars and Venus is
Rainfall patterns depend on
The life supporting gases such as O2, CO2 and N2 are chiefly concentrated in the
‘Ozone hole’ means
Air is a mixture of gases with the following gas in maximum percentage
When we breathe in air, nitrogen also goes inside along with oxygen. What is the fate of this nitrogen?
The average amount of N2 in the atmosphere is
Oxygen is returned to the atmosphere mainly
When water mixes with carbon dioxide in the air, it forms
Soil erosion can be prevented by
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