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Global Thermostat unveiled a direct air carbon capture machine near Denver that it said can draw about 1,000 tons of carbon dioxide out of the atmosphere a year.

In 2021, Flagstaff, Ariz., and Boulder County, Colo., launched the 4 Corners Carbon Coalition to help spur innovation in carbon dioxide removal around the region. Last week, Santa Fe, N.M., and Salt Lake City also joined the group.