Wall Street Journal: LIFES A BEACH FOR SAND MINERS The U.S. shale bonanza is creating a boom in another, perhaps less likely, commoditysand, a key ingredient in fracking. Sand use has increased 25% since 2011, The Wall Street Journals Alison Sider and Kristin Jones report, with a further 20% rise expected in the next two years. Oil companies need enormous quantities of sand to pour down oil and gas wells and flush out fossil fuels. It takes 25 railcars of sand, on average, to frack one well, and companies are experimenting...