The ongoing conflict between Israel and the United States, which have been conducting a joint air campaign against Iran, may trigger a potential environmental crisis across the Middle East. The conflict has claimed over 1,700 lives, including seven Americans and the Islamic Republic’s former Supreme Leader, Ali Khamenei. The ongoing conflict has injured over 140 U.S. service members and cost American taxpayers over $6 billion. The bombing campaign has also released microscopic particulate matter into the air, which can be harmful to civilian populations. Israel’S targeting of Iranian oil infrastructure has significantly increased the threat to public health. Many Iranian cities that have been targeted by the US and Israel have reported significantly deteriorating air quality in recent days. Climate Crisis 247 identified the cities in Iran and across the region that have reported sharpest declines in air quality.