Final answer:
The United Nations Framework Convention on Climate Change (UNFCCC) occurred in the 1990s during the Rio Earth Summit.
Explanation:
The United Nations Framework Convention on Climate Change (UNFCCC) took place in the 1990s, specifically in 1992 during the Rio Earth Summit. It was a milestone event where 197 countries ratified the convention, working towards stabilizing greenhouse gas concentrations to prevent dangerous interference with the climate system.
Learn more about United Nations Framework Convention on Climate Change (UNFCCC) here:
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