Iran’s black rain is latest grim example of weather in war zones

Strikes on oil facilities burned thousands of tons of stored fuel, producing a pall of toxic smoke Black rain fell in Iran earlier this month, a grim phenomenon seen previously in other war zones. Strikes on oil facilities burned thousands of tons of stored fuel . Unlike the clean controlled combustion inside an engine, uncontrolled burning leaves many particles of unburned fuel, producing a pall of toxic smoke over affected areas.