Question
At an individual level, how can you help reduce air pollution?

Answer

At an individual level, one can do following things to reduce air pollution:
$i.$ One can use vehicles consuming fuels like $\text{CNG}$ and unleaded petrol, rather than those using fuels like diesel, petrol, etc.
$ii.$ One can avoid unnecessary usage of vehicles. And try using public transport more.
$iii.$ One can avoid using crackers.
$iv.$ One can generate awareness about air pollution among friends and neighbours.
$v.$ One can switch over to alternative fuels instead of the fossil fuels for energy requirements. These could be solar energy, hydropower and wind energy.
$vi.$ One can plant trees and nurture those trees already present in the neighbourhood.
$vii.$ Dry leaves can be burnt in a compost pit rather than burning in open.

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