Michael Elizabeth Sakas
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Extreme fires are more likely with climate change, and they're making it harder for some tree species to regenerate. Ecologists say this could transform large areas of Western forest into grassland.
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As the warming climate makes extreme fires more likely, some iconic tree species are not growing back like they used to. Ecologists say this could transform vast areas of western forests.
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Parts of the Front Range hit 100 degrees over the weekend, then woke up to snow on Tuesday. Meteorologists will track whether the enormous swing set a new record in the U.S.
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Winters are warming faster than summers in many places, and colder parts of the U.S. are warming faster than hotter ones. The warming winter climate has year-round consequences across the country.
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There's new concern that the growing cannabis industry may be contributing to air pollution. But it's a tricky thing to study, since pot is still illegal under federal law.
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A young teenager in Colorado has been named one of Forbes 30 under 30, a list made up of the "brashest entrepreneurs" in the U.S. and Canada.
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The weeks after the Columbine High School's deadly shooting saw waves of activism from students and parents concerned about gun access.