Noida in Uttar pardesh is the most polluted city in India."All city in India observed air quality change compared to 2018, 63./. Shaw direct change against 2019, To prevent pollution the government must impose and enforce laws prohibiting cutting down of trees,Indiscriminate use of microphones and
discharging dirty liquid into rivers and
seas.pollution is the greatest threat to humanity
In recent times.The smoke from mills and factories create air pollution.