From brightening ocean clouds to launching sulfur dioxide into the stratosphere, some entrepreneurs and scientists are testing technology that could reflect sunlight back into space to combat global warming. There's evidence some types of solar geoengineering could lower global temperatures a lot. But along with potential benefits come huge potential risks. Experts say the science isn't settled and regulations aren't keeping up. Today on The Sunday Story, a journey into the world of solar geoengineering. Learn more about sponsor message choices: podcastchoices.com/adchoices NPR Privacy Policy

As protests and arrests continue at college campuses across the U.S.. are the students calling for divestment in Israel getting closer to their demands? The U.S. Supreme Court took nearly three hours to debate whether a president should have absolute immunity from criminal prosecution. And New York State's highest court has overturned the criminal conviction of former Hollywood producer Harvey Weinstein. Want more comprehensive analysis of the most important news of the day, plus a little fun? Subscribe to the Up First newsletter. Today's episode of Up First was edited by Andrea de Leon, Meghan Sullivan, H-J Mai, Elana Perl, Jan Johnson and Ben Adler. It was produced by Ziad Buchh, Ben Abrams and Nina Kravinsky. We get engineering support from Stacey Abbott, our technical director is Zac Coleman, and our Executive Producer is Erika Aguilar. Learn more about sponsor message choices: podcastchoices.com/adchoices NPR Privacy Policy