According to a July 29, 2015 AP from release from The Blade newspaper out of Toledo, OH, toxic algae blooms are reappearing as expected in Lake Erie, and the usual suspects are believed to be the cause: climate change, combined sewage overflows, malfunctioning septic systems, and agricultural runoff.
So which of these sources is likely to be the greatest contributor to the problem?
Research suggests that agricultural runoff — when manure spread on fields or in barns flows into lakes, rivers and streams after rains or thaws — is by far the largest source. Over 60%, according to this recent article from Scientific American.
Something can be done — such as assisting farmers in implementing better land management practices — to curb this harmful, toxic runoff. And it must. Preferably sooner than later.