Hundreds of top scientists released a devastating report Monday on the danger that human-caused climate change poses to the world.

Calling it “code red for humanity,” the landmark report was released in Geneva, Switzerland, by the United Nations’ Intergovernmental Panel on Climate Change (IPCC).

Many of the changes seen in the world’s climate are unprecedented in thousands, if not hundreds of thousands of years, and some of the changes already set in motion – such as continued sea-level rise – are irreversible over hundreds to thousands of years, according to the report.