 I'd be lying if I said I wasn't worried, but action is the best antidote to anxiety, and I'm working to ensure climate change doesn't separate our species for good. But until then, it's bringing us too close together. Coexistence is the only option. Let's make it safe for all. Thank you. That's Alyssa McCall. She's the director of conservation outreach at the nonprofit Polar Bears International. You can see her full talk at TED.com.