MIT group shows xylem tissue in sapwood can filter bacteria from contaminated water.
If you’ve run out of drinking water during a lakeside camping trip, there’s a simple solution: Break off a branch from the nearest pine tree, peel away the bark, and slowly pour lake water through the stick. The improvised filter should trap any bacteria, producing fresh, uncontaminated water.
Read more: https://bit.ly/1lSuzRR
