Joshua Goldstein and Staffan Qvist have a plan to save the world – from climate change disaster. In their new book, A Bright Future: How Some Countries Have Solved Climate Change and the Rest Can Follow , the authors advocate for the use nuclear energy to supplant the consumption of fossil fuels and ease the carbon emissions that are choking the planet. They contend that a combination of nuclear and renewables is the best path to slowing climate change. Goldstein is a professor emeritus of international relations at American University, and Qvist is an energy engineer and consultant to clean energy projects around the world. They recently visited the  Knowledge at Wharton radio show on SiriusXM to talk about their book. (Listen to the podcast at the top of this page.) The following are key takeaways from the interview. What inspired this book? Goldstein said he was drawn to the issue of climate change by his children, who convinced him that it deserved his attention.…