E. Answer the following questions.
1. Why is air necessary for animals?
2. How is nitrogen important for plants?
3. How is the balance of oxygen and carbon dioxide in air, maintained in
nature?
4. Why is 'acid rain' harmful?
5. Why should we feel ‘worried about 'global warming'?
6. Suggest some ways of reducing air pollution.
7. How does planting of trees help in making air cleaner?
Answers
Answer:
1. Animals need oxygen from air to carry out the reactions that release and transform energy from food. Carbon dioxide is released as a waste product during these processes. In mammals, including humans, air enters the body through the nose and mouth, and moves into the lungs.
2. Nitrogen Is Key to Life!
When plants do not get enough nitrogen, they are unable to produce amino acids (substances that contain nitrogen and hydrogen and make up many of living cells, muscles and tissue). Without amino acids, plants cannot make the special proteins that the plant cells need to grow.
3. The balance of oxygen and carbondioxide is maintained in the atmosphere by the oxygen released by plants during photosynthesis and carbondioxide released by human,animals etc. in the atmosphere.
4. The pollution that causes acid rain can also create tiny particles. When these particles get into people's lungs, they can cause health problems, or can make existing health problems worse. ... This ground-level ozone causes respiratory problems, like pneumonia and bronchitis, and can even cause permanent lung damage.Trees remove carbon dioxide from the atmosphere and reduce the greenhouse gas effect, all while providing us with clean air to breathe.” One big way that trees affect air quality is by reducing outdoor temperatures. ... Remember, trees breathe in pollutants like carbon dioxide, and breathe out oxygen for us to inhale.
5. Even a small increase in global temperatures will destabilise the water cycle and could make water scarcity much worse. Climate change affects rainfall patterns, meaning both drought and flooding will be more common, and more intense.
6. Riding a bike or walking instead of driving.
Taking a bus or carpooling.
Buying a car that has greater fuel efficiency.
Turning off lights and appliances when they are not in use.
Using energy efficient light bulbs and appliances.
Buying fewer things that are manufactured using fossil fuels.
7. Trees remove carbon dioxide from the atmosphere and reduce the greenhouse gas effect, all while providing us with clean air to breathe.” One big way that trees affect air quality is by reducing outdoor temperatures. ... Remember, trees breathe in pollutants like carbon dioxide, and breathe out oxygen for us to inhale.