Our oceans help to feed us. They absorb heat from the sun and make it possible for us to live on this planet. But rising temperatures are changing the waters below the surface, warming our oceans, and killing creatures that live there. Scientists expect these marine heatwaves will become longer, more frequent and more severe. We'll dive into efforts to repair the damage and meet innovators who are trying to turn the tide. Host: Catherine Kobayashi Guest: Greg Dalton, Journalist and Host, "Climate One"