Polar bears would not exist today without climate change, and they may even be thriving because of current climate trends. That’s what the co-founder of Greenpeace told scientists, economists, and academics who took part in an international conference challenging alarmist claims about global warming.

Patrick Moore, a Canadian environmentalist who previously served as president of Greenpeace Canada and director of Greenpeace International, was one of several speakers featured as part of the Heartland Institute’s conference on the topic held this month.