PNNL has created and licensed a system that sniffs out trace levels of fentanyl, other drugs and explosives through the air.

Scientists are developing ways to detect previously unseen forms of fentanyl as well as other synthetic opioids known as nitazenes.

Less pollution and the odd shapes of snow grains as they pack together should help cut the decline of snowpack later this century.

In a new paper, researchers point to three major efforts where the biggest climate mitigation gains stand to be realized: ramping up carbon dioxide removal, reigning in non-carbon dioxide emissions and halting deforestation.

Methane emissions from coal mines are likely higher than previously calculated, largely due to emissions from abandoned mines.