The United States will no longer limit the planet-warming pollution that power plants pump into the air while burning coal and gas, the Trump administration announced Monday.

A national clinical trial led by researchers at the University of Arizona College of Medicine – Tucson found that treating young children with an oral bacterial extract did not reduce the risk of severe wheezing and respiratory illnesses that can precede asthma.

To ensure that Indigenous peoples’ rights and knowledge are recognized in scientific data and scholarly publishing, a team of Indigenous scholars led by Lydia Jennings, an assistant professor of environmental studies, has established Guidelines for the Governance of Indigenous Peoples’ Data in Scholarly Publishing.

A new $27 million layer of technology at the city's 32-year-old southside water treatment plant will bring more efficient and effective cleanup of PFAS compounds known as "forever chemicals" from that area's long-polluted aquifer, Tucson Water officials said.

The Pima County Health Department has released a public health review on data centers.

The Pima County Department of Environmental Quality (PDEQ), in collaboration with faculty from the Zuckerman College of Public Health at the University of Arizona, recently launched a network to monitor air quality at several schools in the county.

Fire and medical officials have issued warnings about a supplement offered to Western wildland firefighters who have been exposed to toxic chemicals while battling some of the country's biggest blazes.

A common antibiotic designed to help kids with breathing problems isn’t performing as expected. University of Arizona pediatrics professor Fernando Martinez discusses why certain medications are not effective for treating asthma, and could lead to increased hospital stays instead.

Hundreds of bases are contaminated with PFAS, which are linked to low birth weight and other risks. Politicians from both parties are demanding explanations for why cleanup efforts have stalled.

The rise of fracking has allowed the United States to become the largest natural gas producer in the world. However, the result of this fracking is a high amount of toxic, radioactive wastewater that must inevitably find a place to be disposed of.

For years this wastewater has arrived in Ohio to be pumped deep beneath the ground, where it's meant to safely stay forever. However, it's begun to leak to the surface and risks contaminating not only other oil and gas wells, but major sources of drinking water in the surrounding area as well.