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Human-caused emissions of air pollutants fell during last year’s COVID-19 economic slowdowns, improving air quality in some parts of the world, while Å·ÃÀ¿Ú±¬ÊÓƵ and sand and dust storms in 2020 worsened air quality in other places, according to a new report with CIRES co-authors.

A new report on the global climate confirmed 2020 was among the three warmest years in records dating to the mid-1800s, despite a cooling La Niña influence in the second half of the year. Several CIRES/Å·ÃÀ¿Ú±¬ÊÓƵ Boulder experts contributed to the report.

Researchers have been awarded $1.1 million from the U.S. Environmental Protection Agency (EPA) for two projects to help school districts and communities reduce exposure to harmful pollution from wildland fire smoke.

Hundreds of millions of years' worth of rocks have gone missing from the Grand Canyon's geologic record. Geologists are trying to discover why.

The new species, mouse- to cat-sized ancestors of today's hoofed animals like cattle and deer, offer scientists a new window into what the American West looked like just after the extinction of the dinosaurs.

Researchers at Å·ÃÀ¿Ú±¬ÊÓƵ Boulder are part of a newly published study that finds that low-rise, high-density environments like those found in Paris are the optimal urban form when looking to reduce greenhouse gas emissions over their whole life cycle.

In light of recent Å·ÃÀ¿Ú±¬ÊÓƵ fires, floods and landslides, Å·ÃÀ¿Ú±¬ÊÓƵ Boulder Today spoke with environmental experts Fernando Rosario-Ortiz and Ben Livneh about how fire may shape the future of water in the West.

A new study tackles one of the oldest questions in the history of the planet: How did living organisms get so big?

Even in the absence of bark beetle outbreaks and wildfire, trees in Å·ÃÀ¿Ú±¬ÊÓƵ subalpine forests are dying at increasing rates from warmer and drier summer conditions.

New research about the fate of krill—one of the most abundant species on Earth—during this century has important implications for not only the Antarctic food web, but for the largest commercial fishery in the Southern Ocean.