WIRED @WIRED
Greenland's melting glaciers are spewing sand that happens to be extremely good for making concrete. But is exploiting that valuable, abundant resource on a wider scale environmentally, socially, and economically tenable? https://t.co/4h95cQ5Q2q 📸: Nicolaj Krog Larsen https://t.co/oONFlePk5k — PolitiTweet.org