President Joe Biden brought the U.S. back into the global fight against climate change on Thursday, pledging at an international summit he convened to halve emissions of greenhouse gases by 2030 and double climate aid to developing nations. Poor countries made clear at the summit that they expect money from wealthier nations in exchange for accelerating their own efforts to curb warming, while China and India stuck to plans to continue growing their own carbon emissions before making any cuts, dismaying environmentalists who say the world remains on course toward catastrophe. Biden announced in opening remarks for the two-day summit that the U.S. will reduce its greenhouse gas emissions 50%-52% from 2005 levels by the end of the decade -- significantly boosting a commitment made under former President Barack Obama that was scrapped by former President Donald Trump. “No nation can solve this crisis on our own,” Biden said Thursday from the White House. “All of us, and particularly those of us who represent the world’s largest economies, we have to step up.” Subscribe to our YouTube channel: https://bit.ly/2TwO8Gm Bloomberg Quicktake brings you live global news and original shows spanning business, technology, politics and culture. Make sense of the stories changing your business and your world. To watch complete coverage on Bloomberg Quicktake 24/7, visit http://www.bloomberg.com/qt/live, or watch on Apple TV, Roku, Samsung Smart TV, Fire TV and Android TV on the Bloomberg app. Have a story to tell? Fill out this survey for a chance to have it featured on Bloomberg Quicktake: https://cor.us/surveys/27AF30 Connect with us on… YouTube: https://www.youtube.com/user/Bloomberg Breaking News on YouTube: https://www.youtube.com/c/BloombergQuickTakeNews Twitter: https://twitter.com/quicktake Facebook: https://www.facebook.com/quicktake Instagram: https://www.instagram.com/quicktake