The environmental crises of the past often seem to disappear—have problems like acid rain and smog been solved?

This article originally appeared on The Conversation. Reports are emerging of black rain falling over parts of Iran in the hours after U.S.-Israeli airstrikes on oil depots on the weekend, with some ...

The following essay is reprinted with permission from The Conversation, an online publication covering the latest research. Reports are emerging of black rain falling over parts of Iran in the hours ...