Nature World: Summer is upon us, and that means one frightening truth for those living around the Great Lakes; soon, their water will start turning disturbing greens, browns, and reds. Soon, signs will start appearing at your favorite watering holes that advise against swimming. And for Lake Erie, the worst harmful algae bloom (HAB) ever measured might be right around the corner.
So what exactly is a HAB? Every summer freshwater cyanobacteria (aka: blue-green algae), and related saltwater "Red Tides" approach...