https://www.aljazeera.com/amp/video/the-take-2/2026/3/25/aje-onl-tt_irn_chemicalwarfare_av_v2- Is war turning Tehran’s air into a chemical weapon?Black rain follows Tehran oil strikes, spreading toxic fallout into air, soil and water. Black rain fell over Tehran after oil depot strikes in the US-Israel war on Iran filled the sky with toxic petrochemical smoke. The contamination can seep into lungs, soil and water, with long-term risks from cancer to lasting environmental damage. What happens when the air people breathe becomes part of the battlefield?