Chemical products that contain compounds refined from petroleum, like household cleaners, pesticides, paints and perfumes, now rival motor vehicle emissions as the top source of urban air pollution, according to a surprising NOAA-led study by researchers from CU Boulder and other institutions.

Carbon emissions from the Brazilian Amazon are increasingly dominated by forest fires during extreme droughts rather than by emissions from fires directly associated with the deforestation process, according to a study in Nature Communications.

Standing on a small concrete bridge, environmental activist Janak Daftary gestures toward the crowded banks of the Mithi River, which runs through the heart of Mumbai.

The added weight, electricity demand and aerodynamic drag of the sensors and computers used in autonomous vehicles are significant contributors to their lifetime energy use and greenhouse gas emissions, according to a new study.

When Hurricane Harvey struck Texas in August, industrial facilities in the state shut down, then reopened a few days later. In doing so, they produced nearly 2,000 tons of "excess emissions" -- air pollutants in addition to what was allowed as part of their normal operation.

Natural resources are continually extracted to produce goods that are used in the U.S. – often only briefly – before they are thrown into landfills, incinerators or the natural environment. This system of consumption and disposal results in the waste of precious resources and pollution that threatens our health, environment and global climate.

While serious violations like those in the Flint, Michigan, crisis are rare, ensuring reliable access to safe drinking water poses challenges for communities across the country, according to a recent study led by the University of California, Irvine.

Spraying weeds with chemicals has always been costly. Now it is costly and ineffective, with resistance to herbicides pervasive and demanding a new strategy to protect crops.

Washington State University researchers have found that salmon face a double whammy when they swim in the stormwater runoff of urban roadways.

First, as scientists learned a couple years ago, toxic pollution in the water can kill them. WSU researchers have now determined that fish that survive polluted stormwater are still at risk.

A Duke University-led study has found dangerously high levels of mercury and its more toxic chemical cousin, methylmercury, in soils, sediments and rivers near artisanal gold mines in the West African nation of Senegal.