Question

1. Air is necessary for burning.
Justify the statement.
2. What are the causes of air
pollution?
3. Give any two methods to reduce
air pollution
4. Write two similarities between
combustion and respiration.
5. Define atmosphere. Write
different layers of atmosphere.​

Answer 1

Estimates indicate that the proportion of the global burden of disease associated with environmental pollution hazards ranges from 23 percent (WHO-1997) to 30 percent (Smith, Corvalan, and Kjellstrom 1999). These estimates include infectious diseases related to drinking water, sanitation, and food hygiene; respiratory diseases related to severe indoor air pollution from biomass burning; and vectorborne diseases with a major environmental component, such as malaria. These three types of diseases each contribute approximately 6 percent to the updated estimate of the global burden of disease (WHO 2002).

Explanation:

Answer 2

Answer:

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Explanation:

1.it is correct that air is necessary for combustion you can take example of a candle . that a candle does not burn when we put it under the glass where as it keeps burning when it is not covered with glass.

2.Air pollution is caused by solid and liquid particles and certain gases that are suspended in the air. These particles and gases can come from car and truck exhaust, factories, dust, pollen, mold spores, volcanoes and wildfires. The solid and liquid particles suspended in our air are called aerosols.

3.Reduce the number of trips you take in your car. Reduce or eliminate fireplace and wood stove use. Avoid burning leaves, trash, and other materials. Avoid using gas-powered lawn and garden equipment.

4.Both respiration and combustion require oxygen and both produce energy. ⦿ Energy is released in the form of heat in both respiration and combustion. ⦿ Heat is required for both the respiration and combustion to carry on the process.

5.The atmosphere is the blanket of gases which surrounds Earth. It is held near the surface of the planet by Earth's gravitational attraction. Without the atmosphere there could be no life on Earth. The atmosphere: ... keeps the climate on Earth moderate compared to that of other planets.

1.Troposphere. The troposphere starts at the Earth's surface and extends 8 to 14.5 kilometers high (5 to 9 miles). ...

2.Stratosphere. The stratosphere starts just above the troposphere and extends to 50 kilometers (31 miles) high. ...

3.Mesosphere. ...

4.Thermosphere. ...

5.Ionosphere. ...

6.Exosphere. ...

7.Credit: NASA/Goddard

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