AskDrPower.com talks to Bruce Mast today. Bruce has been in the clean energy business for nearly three decades. He's dedicated his life figuring out win-win solutions for people to live more comfortable and affordable lives while still pitch in to mitigate climate change. His latest project is Peninsula Climate Comfort, a program in the Bay Area helping homes switch out gas furnaces and appliances.  Bruce talks about the switch to electric heat pumps and how they work.