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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.
What is Black Rain?
“Black rain” refers to rainfall that becomes dark or contaminated because atmospheric water droplets absorb soot, carbon particles, dust, and chemical pollutants present in the air. This process is scientifically known as atmospheric scavenging, in which falling raindrops collect airborne pollutants and bring them to the Earth’s surface. The phenomenon has historically been observed after major industrial fires or explosions.
Historical Background
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WHO warns of black rain after Iran oil attacks. Learn about atmospheric scavenging, health risks from toxic rainfall, and environmental impacts of industrial pollution.
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