Lee Hannah is senior researcher in climate change biology at Conservation International (CI), heading CIâ€™s efforts to develop conservation responses to climate change. His research has appeared in journals including Nature, Conservation Biology and Bioscience. Hannah edited the book Climate Change and Biodiversity with Thomas E. Lovejoy. He authored the first undergraduate textbook on the biological impacts of climate change, Climate Change Biology. His latest book is Saving a Million Species: Extinction Risk from Climate Change.