Black rain is a form of environmental fallout in which precipitation becomes heavily contaminated with soot, hydrocarbons, and other pollutants, and is dark, oily, and carries a strong chemical odor.

How is it formed?

  • Releasing thick plumes of black smoke.
  • Huge quantities of particulate matter (soot) and chemical vapors were pushed into the atmosphere.
  • A weather pattern brought rain clouds over the region. As the rain fell through the smoke-saturated air, the water droplets absorbed the suspended particles and chemicals.
  • Mountains in the region acted as a barrier, preventing the smoke from dispersing and forcing the pollutants to settle over the urban center.

Chemical Composition:

  • Toxic Hydrocarbons (Benzene)
  • Sulfur Oxides (SOx) & Nitrogen Oxides (NOx)
  • Particulate Matter (Soot)
  • Forever Chemicals (PFAS)

Health Effects

  • Causes skin burns, eye irritation, and respiratory problems; prolonged exposure may lead to lung damage and cancer.

 

Source: The Indian Express

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