This week we're talking about the big stories of the last few weeks! Why LED lights suddenly turn purple, what walking does to our brains, and the strange city of Lusail in Qatar. News Items LED lights turning purple - Business Insider How walking helps us think - New Yorker The strange city of Lusail Qatar - Guardian The urban drug store decline - Slate European cities getting crowded - Wired Magazine Amsterdam circular economy - Fast Company South Korea zero food waste - Guardian Great Salt Lake collapse - Salt Lake Tribune Solarpunk - Public Books Will casual carpool come back? - Berkeleyside OOO Follow us on twitter @theoverheadwire Support the show on Patreon http://patreon.com/theoverheadwire Buy books on our Bookshop.org Affiliate site! And get our Cars are Cholesterol shirt at Tee-Public!