Time is running out for humanity to act on climate change. Scientists have been shouting that message since the 1980s -- but the world hasn’t heard it. Earlier this week, the United Nations released a new report showing the consequences. It confirms climate change is happening now. And it predicts a bleak future unless there are radical changes.
Linda Mearns is a senior scientist at the National Center for Atmospheric Research in Boulder. She contributed to the UN report. We also hear from CPR climate and environment reporter Sam Brasch on the state's policies to address the issue.