Farms have become a major air-pollution source

A new study says that emissions from farms outweigh all other human sources of fine-particulate air pollution in much of the United States, Europe, Russia and China. The culprit: fumes from nitrogen-rich fertilizers and animal waste that combine in the air with industrial emissions to form solid particles — a huge source of disease and death. The good news: if …

Methane four corners

What is the source of mysterious methane emissions at Four Corners?

This is a joint release of the Cooperative Institute for Research in Environmental Sciences (CIRES) and the Institute for Arctic and Alpine Research (INSTAAR) at the University of Colorado Boulder (CU-Boulder), NOAA, NASA and the University of Michigan (U-M). A team of scientific investigators is now in the Four Corners region of the U.S. Southwest, aiming to uncover reasons for a mysterious methane …