Study: Many U.S. lakes are keeping up with pollution, if not exactly getting cleaner

Lake pollution has largely remained unchanged since 1990, despite expanding agriculture, urban development and climate change, says a study of 3,000 lakes in the Midwest and eastern states. Seven percent of the lakes in the study saw increases in phosphorus — a common component of farm runoff that’s implicated in toxic green-algae blooms. Nine percent of… » Read More