Steve's guest this week is renowned professor and climate scientist, Dr. Katharine Hayhoe. In 2014, Katharine was named one of Time Magazine’s Most Influential People and a couple of years ago she was named the United Nations Environmental Program’s Champion of the Earth. Katharine's new book “Saving Us: A Climate Scientist’s Case for Hope and Healing in a Divided World” is in bookstores now. In part one, Katharine shares her journey to becoming a climate scientist, why climate change has become so political, and the importance of talking about solutions.