Global Warming and Rat Refuse
Unraveling the links between global warming and weather changes in different parts of the world is proving to be a tall order. But an American geologist recently came across an unexpected source of information: urine-encrusted piles of rodent refuse deposited 7,000 years ago in the desert of South Yemen. NPR's John Nielsen has the story.
We speak with investigative reporter Geoffrey Cain who writes about the Chinese surveillance of the Uyghur ethnic minority in western China. He writes about the sophisticated technology and a so-called predictive policing system in his new book, "The Perfect Police State." And, trees in neighborhoods all over the mid-Atlantic U.S. are being choked by fast growing, non-native vines. As Jacob Fenston of WAMU reports, a new study says freeing trees from these invasive vines is an essential tool to fight climate change.  Connect with us: Find more stories from today's show here. Follow us on Twitter, Facebook and Instagram. Subscribe to our podcast here. Email the show at letters@hereandnow.org