Chemistry
The diagram represents the green house effect.
- State why the effect is called 'global warming'.
- Name a process which (a) releases (b) absorbs – green house gas – CO2.
- State an advantage of use of C.N.G. over combustion of fossil fuels.
- Which of the following – biofertilizers or nitrogenous fertilizers reduces the green house gas – N2O. Explain.
- Does the sea level rise or fall due to global warming. Explain.
Pollution
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Answer
- The green house effect results in rise of atmospheric temperature which is not confined to one region but also has a global impact and is termed as 'global warming'.
- Process which releases – CO2 is respiration and
the process which absorbs – CO2 is photosynthesis. - C.N.G. causes minimum pollution. It does not contain lead and lowers maintenance cost as compared to vehicles with other forms of fuels.
- Biofertilizers reduce the green house gas N2O as nitrogenous fertilizers release N2O when used in agricultural activities.
- The sea level rises due to global warming as increase in temperature melts ice on mountains, ice-caps.
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