How do you talk to someone who doesn’t believe in climate change? Not by rehashing the same data and actualities we’ve been discussing for years, says climate scientist Katharine Hayhoe. In this inspiring, pragmatic talk, Hayhoe shows how the key to having a real discussion is to connect over shared values like clas, community and belief — and to spur parties to realize that they already care about a changing climate. “We can’t give in to despair, ” she says. “We have to go out and look for the hope we need to inspire us to act — and that hope begins with a conference, today.”

Read more: ted.com.