A report out this week warns extreme heat waves, like the ones many parts of the world have experienced this summer, are likely to worsen over the next three decades. Climate research nonprofit First Street Foundation says by 2023, more than 8 million Americans could experience heat above 125 degrees Fahrenheit. In 30 years, more than 107 million people across the country will deal with those sweltering temperatures. And most of them will probably want air conditioning. But traditional AC units create more carbon emissions, which create more global warming. Marketplace’s Kimberly Adams speaks with Ankit Kalanki, a manager at Third Derivative, a climate tech accelerator. He says there are companies working on updating the technology that keeps us cool.