1. Dust, mist, fumes etc. are air borne particles which are dangerous for human health. Particulate pollutants bigger than 5 microns are likely to settle in the nasal passage whereas particles of about 10 microns enter the lungs easily and causes scaring or fibrosis of lung lining.
They irritate the lungs and causes cancer and asthma. This disease is called pneumoconiosis. Coal miners may suffer from black lung disease. Textile workers may suffer from white lung disease.
2. Lead particulates affect children’s brain. interferes with maturation of RBC’s and even causes cancer.
3. Particulates in the atmosphere reduces the visibility by scattering and absorption of sun light. It is dangerous for aircraft and motor vehicles.
4. Particulates provide nuclei for cloud formation and increases fog and rain.
5. Particulates deposit on plant leaves and hinder the intake of CO2 from the air and affect photosynthesis.
