For the first time, scientists have linked high-density animal operations in the U.S. Midwest to rising air pollution from ammonia, suggesting need for increased regulation from the EPA.

Grace van Deelen
Grace van Deelen, joined Eos in 2023 as a staff writer. She covers all things Earth science and is particularly interested in stories that highlight the intersection of society, the environment, and equity in science. Grace holds a master’s degree from MIT’s Graduate Program in Science Writing and bachelor’s degrees in biology and anthropology from Tufts University.