➢ Pollutants → Harmful & undesirable substances
✓ Dust
✓ Smoke
✓ SO2, CO, CO2 (excess)
Air pollution – Causes
➢ Cutting of forests
➢ Emission of harmful gases → Automobiles, Industries
➢ Burning of fossil fuels
➢ Chemical weapons like atomic bombs used in war → Releases radioactive particles
➢ Natural causes → Volcanic eruption
➢ Use of fertilisers & pesticides → Chemicals can be blown off or can evaporate in air.
➢ Increase in human population
Air pollution – Effects
➢ Health
✓ Dizziness & Headache
✓ Eye irritation
✓ Nasal irritation
✓ Coughing & shortness of breath
✓ Sore throat
✓ Chest pain
✓ Lung cancer or other lung diseases
➢ Plants → Damage leaves
➢ Acid rain
✓ SO2, NO2
➢ Accidents
✓ Pollutants → Dust, smoke → Reduce visibility
➢ Global warming
✓ Greenhouse effect
✓ Greenhouse gases - CO2, CH4, N2O, H2O vapour
✓ Excess greenhouse gases
➢ Ozone depletion
✓ Stratosphere → Ozone layer
✓ Protects from UV rays
✓ CFC’s → deplete ozone layer
✓ UV rays reaches surface → Skin diseases
Air pollution - Prevention
➢ Plants trees
✓ Maintains balance of CO2 & O2 in air
✓ Brings more rain → Atmosphere free of pollutants (e.g., dust particles) Air pollution - Prevention
➢ Vehicles → checked for pollution control
➢ Use of CNG operated vehicles, EV’s
➢ Use of Solar energy
➢ Industrial area must be away from residential areas
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