WHO Warning on “Black Rain”
Context
In March 2026, the World Health Organization (WHO) issued an emergency warning about the possibility of “black rain” and severe air pollution in Iran after attacks on oil facilities triggered large-scale fires. The burning of petroleum infrastructure released massive quantities of carbon soot, hydrocarbons, sulphur oxides, and nitrogen compounds into the atmosphere. These pollutants mixed with rain-bearing clouds, raising concerns about toxic rainfall and serious public health risks.
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