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In Delhi, screens are put up across the city showing PM 2.5 levels as being dangerous. Particulate Matter (PM) are small dust and soot particles that come out from car exhausts. These particles are only 0.0025 millimetres thick which is thinner than the human hair! Why do you think these particles are dangerous to our body? |
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Answer» In Delhi, screens are put up across the city showing PM 2.5 levels as being dangerous. Particulate Matter (PM) are small dust and soot particles that come out from car exhausts. These particles are only 0.0025 millimetres thick which is thinner than the human hair! Why do you think these particles are dangerous to our body? |
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