Craig Mclean, former NOAA assistant administrator for research, says the U.S.’s exit won’t help the nation’s interests and economy and “won’t increase the quality of life of Americans.” Subscribe to ABC News on YouTube: https://abcnews.visitlink.me/59aJ1G Watch 24/7 coverage of breaking news and live events on ABC News Live: https://www.youtube.com/watch?v=gN0PZCe-kwQ&ab_channel=ABCNews Watch full episodes of World News Tonight with David Muir here: https://youtube.com/playlist?list=PLQOa26lW-