One of the world's best-known thinkers about global climate change is Australian writer Tim Flannery. He's not only a best-selling author, he's also his country's first Chief Commissioner for Climate Change.
His latest book, Here on Earth: a Natural History of the Planet, paints a hopeful picture of the future of human life on earth. He recently gave a talk in Seattle, where he said his message of optimism seemed to have trouble getting through to his audience.
KPLU's Bellamy Pailthorp caught up with him for an interview.