For a few weeks over the summer in 2011, teams of scientists from around the world converged on a small patch of ponderosa pine forest in Colorado to carry out one of the most detailed, extended survey of atmospheric chemistry ever attempted in one place, in many cases using new measurement devices created especially for this project. Now, after years of analysis, their comprehensive synthesis of the findings have been released this week.

Human production of fixed nitrogen, used mostly to fertilize crops, now accounts for about half of the total fixed nitrogen added to the Earth both on land and in the oceans.

New measurements of molecular iodine in the Arctic show that even a tiny amount of the element can deplete ozone in the lower atmosphere.

Firebricks, designed to withstand high heat, have been part of our technological arsenal for at least three millennia, since the era of the Hittites. Now, a proposal from MIT researchers shows this ancient invention could play a key role in enabling the world to switch away from fossil fuels and rely instead on carbon-free energy sources.

Researchers from the United States and China have proposed an idea that could improve China’s air quality, but they’re not atmospheric scientists. They’re agronomists.

“China’s poor air quality is caused by a combination of coal burning and particulates from soil erosion. The Loess Plateau is the major source of erosion in China, and air quality there is just terrible. If erosion in the Loess Plateau can be improved, air quality will improve,” says D.K. Lee, an agronomist in the Department of Crop Sciences at the University of Illinois.

Refineries and petrochemical plants in south Texas released nearly 1 million pounds of seven especially dangerous air pollutants during flaring and chemical spills triggered by Hurricane Harvey, according to a new Center for Biological Diversity analysis of industry data.

CO2 and methane are the most significant greenhouse gases resulting from human activity, said Hui Wang, professor in the Department of Chemical and Biological Engineering at the University of Saskatchewan.

Capturing CO2 and methane emissions from industrial sources and reusing them could reduce the threat on the world’s ecosystem by slowing climate change, said Wang, the principal researcher of a paper published in Catalyst Today.

On Aug. 29, NOAA announced 15 new marine debris projects that will support marine debris removal and research received nearly $2.2 million in fiscal year 2017 funding through the NOAA Marine Debris Program. These projects support efforts to address the pervasive global problem of marine debris that can impact wildlife, navigation safety, human health, and the economy. Shown here: In an earlier NOAA-funded project, derelict fishing gear and other large marine debris were removed from remote Alaskan shorelines by the Gulf of Alaska Keeper.

Scientists at the University of York’s Stockholm Environment Institute (SEI) have released new figures showing long-term exposure to ozone air pollution is linked to one million premature deaths per year due to respiratory diseases - more than double previous estimates.

In 2010, long-term outdoor exposure to ozone air pollution contributed to about one million premature respiratory deaths globally – approximately one in five of all respiratory deaths.

Human antidepressants are building up in the brains of bass, walleye and several other fish common to the Great Lakes region, scientists say.