UN: Brief gains in air quality in 2020 over COVID lockdowns

The U.N. weather agency says the world—and especially urban areas—experienced a brief, sharp drop in emissions of air pollutants last year amid lockdown measures and related travel restrictions put in place over the coronavirus ...

Low-cost sensors measure real-time volcanic smog exposure

When Kīlauea Volcano erupted in 2018, lava covered parts of the Island of Hawaii, but a volcanic smog, known as "vog," inundated it. The vog contained dangerous levels of fine particulate matter and sulfur dioxide gas, which ...

Nitrogen inputs in the ancient ocean

It was long assumed that cyanobacteria were mainly responsible for fixing nitrogen on early Earth, thus making nitrogen available to the biosphere. Researchers at the Max Planck Institute for Marine Microbiology in Bremen, ...

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