The Last Word with Lawrence O'Donnell 03/28/17

Bill Nye on Trump's climate orders: 'Clean coal is a myth'

Bill Nye the Science Guy joins Lawrence O'Donnell to react to Trump's rollback of Obama climate change rules, Spicer's non-answer about whether the president still believes climate change is a hoax, and the Trump budget's proposed cuts to U.S. science agencies. ... more Duration: {{video.duration.momentjs}}