Which of the following statement s is are correct about lsquo lsquo Suspended Particulate Matter SPM...........

Environment and Ecology Air Pollution

Which of the following statement(s) is/are correct about ‘‘Suspended Particulate Matter (SPM)’’, a major air pollutant?

1. Major source of SPM are: vehicles, power plants, construction activities, oil refinery etc.

2. Oxides of iron, aluminium, manganese, zinc and other metals have adverse effect due to deposition of dust on plants and causes biochemical and metabolic dysfunction.

3. Tetraethyl lead if inhaled leads to severe nephrological and haematological disorders.

Select the correct answer using the codes given below:

3 only

1 and 2 only

2 and 3 only

1, 2 and 3

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Explanation:

Particulate matter suspended in air are dust and soot released from the industrial chimneys. Their size ranges from 0.001 to 500 micrometers (µm) in diameter.
Particles less than 10 µm float and move freely with the air current. Particles which are more than 10 µm in diameter settle down. Particles less than 0.02 µm form persistent aerosols.
Major source of SPM (suspended particulate matter) are vehicles, power plants, construction activities, oil refinery, railway yard, market place, industries, etc.
According to Central Pollution Control Board (CPCB), particulate size 2.5 µm or less in diameter (PM 2.5) are responsible for causing the greatest harm to human health.
These fine particulates can be inhaled deep into the lungs and can cause breathing and respiratory symptoms, irritation, inflammations and pneumoconiosis – a disease of the lungs due to inhalation of dust, characterized by inflammation, coughing, and fibrosis