• # question_answer 29) In Delhi, due to bad quality of air, people felt difficulty in breathing and irritation in eyes. (i) What was the reason of bad condition of air? (ii) Name the pollutant present in air and other things creating this condition,

 (i) Air pollution was the reason of bad condition of air. The air was contaminated by unwanted substances that had harmful effect on both living and non-living things. (ii) The air pollutants that contaminated the air were: Smoke, dust, Sulphur dioxide$(S{{O}_{x}})$, Nitrogen dioxide$(N{{O}_{x}})$, particulate matter. The other sources were factories, power plants, automobile exhausts, the burning of various   materials like cow dung, fire wood.