(CNN) How many scientists does it take to convince the world to take climate change seriously?

More than 11,000 researchers from around the world on Tuesday issued a grim warning of the "untold suffering" that will be caused by climate change if humanity doesn't change its ways.

The group said that as scientists, they have the "moral obligation to tell it like it is."

Phoebe Barnard, one of the lead authors of the report and the chief science and policy officer at the Conservation Biology Institute, a nonprofit science group, told CNN the report makes it clear "there's no more wiggle room" for policymakers.

"Posterity will remember them badly for dismissing climate change as a serious threat to our civilization," she said.