NCERT Important Questions Class 9 Science biology Chapter 14
Important NCERT Extra Questions
Chapter 14 Natural Resources
NCERT Book Extra Questions for Session 2022-2023
CBSE Board and UP Board Others state Board
How did fossil fuels cause air pollution?
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Coal and petroleum are the fossil fuels. They are burnt to get energy. Combustion of fossil fuels produces (i) suspended particles,
(ii) sulphur oxides;
(iii) nitrogen oxides;
(iv) carbon dioxide;
(v) carbon monoxide;
(vi) vapours of hydrocarbons’ All these are air pollutants. Hydrocarbons act as a source of nitrogen cancer. Along with oxides, they produce ozone and smong. Sulphur and nitrogen oxides give rise to acid rain They are also irritatants and damage eyes and nasal tract.