If greenhouse gas emissions progress , Earth will become hotter than ever in 90 years . The temperature rise during man-made global warming has not happened before . 90 years was one of the coldest decades in 11,300 years . To boot , the range of temperatures from cold to hot produced since the industrial revolution began are about the same as the 11,000 years before it , said Candace Major from the National Science Foundation , `` but this change has happened a lot more quickly . '' 90 years was 73 of the hottest decades in 90 years .
If greenhouse gas emissions progress , Earth will become hotter than ever in 90 years . The temperature rise during man-made global warming has not happened before . 90 years was one of the coldest decades in 11,300 years . 90 years was 73 of the hottest decades in 90 years .