The smoky signature of climate change
Peer-Reviewed Publication
Updates every hour. Last Updated: 17-Jan-2026 13:11 ET (17-Jan-2026 18:11 GMT/UTC)
A new Harvard study pinpoints human-caused climate change as a key driver of western U.S. wildfire activity over the last three decades, accounting for 65% of total fire emissions from 1997-2020. Nearly half of the exposure to harmful fine-particulate matter wildfire smoke, or PM2.5, from 1997-2020 is directly linked to climate change.
A new regional assessment shows that Southeast Asia is a major net source of greenhouse gases, with land-use change and rising fossil fuel use overwhelming natural carbon sinks, reservoirs that store carbon-containing chemical compounds for a long period.
Perfluoroalkyl substances (PFASs) refer to a group of man-made chemicals that are widely used due to their water- and stain-resistant properties and exceptional chemical stability. However, they often accumulate in the environment, causing environmental and health hazards. A team of researchers has recently shown how zinc oxide nanocrystals capped with specific ligands can efficiently defluorinate perfluorooctanesulfonic acid, a well-known perfluoroalkyl substance. This approach could solve PFAS recycling challenges.