President Donald Trump publicly acknowledged that humans bear some blame for climate change, but scientists say the president still isn't dealing with the reality of our primary role. Pressed repeatedly in Tuesday night's debate, Trump gave one of his fullest accountings yet of what scientists say is an escalating climate crisis threatening every aspect of life. Pushed by moderator Chris Wallace, and at one point by rival Joe Biden, Trump also pushed back on scientific findings that his environmental rollbacks would increase climate-damaging pollution.