Kathy Hannun began incubating within Google X, the startup that would become Dandelion, a home geothermal energy company that today is the largest and fastest-growing in America. With several thousand residential installations completed in the Northeast, Dandelion is scaling nationally, partnering with installers and homebuilding giants like Lennar. Carbon-free geothermal energy is about to become the default heating and cooling source for thousands of American homes.
