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Methods of Disposal of Waste

How does SPM ...

Question

How does SPM [suspension particulate matter] increases the absorption power of earth's crust?

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Solution

SPM [suspension particulate matter] doesnot increase the absorption power of earth’s crust. In fact, it reflects back the solar radiation and reduces the amount of solar radiation reaching the earth and thus reduce the amount of solar radiation absorbed by the earth.

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Q. suspended particulate matter (SPM)

Q. Which statement/s is/are true about Suspended Particulate Matter (SPM)?

Question 14
Name any two sources which cause air pollution due to suspended particulate matter (SPM).

Q. Assertion : Suspended particulate matter (SPM) is an important pollutant released by diesel vehicles.
Reason : Catalytic converters greatly reduce pollution caused by automobiles.

Q. Read the following statements regarding particulate matter and select the incorrect ones.
(i) Particulate matter (PM) consists of soot, fly ash, dust, spores, pollen grains, etc.
(ii) Particulate matter is differentiated into settle able (larger than

10

remaining in air for more than one day to several weeks) particulate matter.
(iii) SPM (suspended particulate matter) consists of aerosol, dust and mist.
(iv) Particulate matter causes respiratory diseases such as tuberculosis, allergy and many more diseases in animals and plants.
(v) According to Central Pollution Control Board (CPCB), particulate size of

2.5

or less in diameter are responsible for causing the greatest harm to human health.

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