As we look ahead to 2020 and think about tackling giant problems, climate change is high on the list. So, we wanted to re-air an interview with the leader of a company that thrives on tackling giant problems. X, Formerly Google X, is the division of Alphabet devoted to moonshots. Its climate-related graduates include Dandelion, which harnesses heat from geothermal energy, and Malta, which uses salt to store excess energy produced from solar and wind farms.