It’s the 44th anniversary of Earth Day, yet the climate change news is only getting worse. So we're convening a family meeting to talk about the state of the environment. No politics, no hysteria, just science. What’s already happened, how it can be fixed and where you fit in. The Earth Institute’s Steven Cohen joins us and a climate scientist from the IPCC takes your global warming questions. Plus: Oysters are back in New York Harbor.