President-elect Donald Trump is indicating he will revoke a recently issued rule to help slow detrimental climate change. The U.S. Environmental Protection Agency has shown that the annual emissions of greenhouse gasses in the U.S. contain millions of metric tons of the carbon dioxide threatening human health. In the greater Phoenix area these emissions totaled more than 46 million metric tons in 2020. Klaus Lackner, a professor in the School of Sustainable Engineering and the Built Environment, part of the Fulton Schools, and director of ASU’s Center for Negative Carbon Emissions, which is designing technologies to capture CO2 from outdoor air, explains why it’s critical to dramatically cut back on such emissions.  The article was also published in the Gila Herald.