What I read today Oct 15

• How to Clean Water With Old Coffee Grounds, smithsonianmag
• Whole Foods Sets Up Shop in Low-Income Neighborhoods, WSJ
  On one hand, it's great low-income residents can get quality food. On the other, the city sold property and provided subsidies totaling around $13mil. 
• Our love of cheap seafood is tainted by slavery: how can it be fixed?, The Guardian