Sylvia Earle

As the health of our oceans go, so goes the health of our planet. But climate change, overfishing and pollution have taken their toll – what can we do to help? Sylvia Earle, National Geographic Explorer in Residence This program was recorded in front of a live audience at the Commonwealth Club of California on May 27, 2015. Learn more about your ad choices. Visit megaphone.fm/adchoices