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Ancient Feces Suggest North America's First and Largest Pre-European City Fell to Climate Change
Climate change may have contributed to the fall of North America's first and largest pre-European city — and the proof may be in the poop, researchers said this week. A new study published in the journal Proceedings of the Natural Academy of Sciences details how fecal records linked to Cahokia, one of the most prominent agricultural sites in North America, gives clues into how declining precipitation and serious flood events may have impacted the population of the city, which is located outside of modern-day St. Louis.
"Cultures can be very resilient in face of climate change but resilience doesn't necessarily mean there is no change," coauthor Sissel Schroeder said in a statement. "There can be cultural reorganization or decisions to relocate or migrate. We may see similar pressures today but fewer options to move."
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The statistics around threatened species are looking grim. A new report by the International Union for Conservation of Nature (IUCN) has added more than 9,000 new additions to its Red List of threatened species, pushing the total number of species on the list to more than 105,000 for the first time, according to the Guardian.
By Kristy Dahl
Last week, UCS released Killer Heat, a report analyzing how the frequency of days with a dangerously hot heat index — the combination of temperature and humidity the National Weather Service calls the "feels like" temperature — will change in response to the global emissions choices we make in the coming decades.
Green is the new black at Zara.
The Spanish fast fashion behemoth has made a bold move to steer its industry to a more environmentally friendly future for textiles. Inditex, Zara's parent company, announced that all the polyester, cotton and linen it uses will be sustainably produced by 2025, as CNN reported.