“Black Rain” Reported in Iran Raises Health Concerns

A rare phenomenon called “black rain” has been reported in parts of Iran following fires at oil facilities.

  • The World Health Organization (WHO) has warned of serious public health risks due to polluted rainfall.

What is Black Rain?

  • Rainfall contaminated with soot, ash, oil droplets or industrial pollutants.
  • Occurs when raindrops absorb pollutants from the atmosphere (atmospheric scavenging).
  • Appears dark, oily or black in colour.

Causes of Black Rain

  • Oil fires and refinery explosions releasing hydrocarbons and soot.
  • Wildfires producing dense smoke.
  • Industrial pollution events.
  • Volcanic eruptions or nuclear fallout.

Why WHO Issued a Warning

  • Black rain contains toxic particles like black carbon and hydrocarbons.
  • May include ....
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