Question

Write an essay on air pollution.

Answer 1

1. Air is a mixture of several gases.
2. The main gases are Nitrogen (78.09%) for forming products such as fertilizers for plants and for making the air inert, Oxygen (20.95%) for breathing, and Carbon dioxide (0.03%) for Photosynthesis.
3. Air pollution is the contamination of the indoor or outdoor air by a range of gases and solids that modify its natural characteristics and percentage.

• It categorized into
  i) Primary pollutants
  ii) Secondary pollutant.

1. Primary Pollutants:
   i) Oxides of Sulphur
   ii) Oxides of Nitrogen
   iii) Oxides of Carbon
   iv) Particulate Matter
   v) Other Primary Pollutants
2. Secondary Pollutants:
   i) Ground-Level Ozone
   ii) Smog.