Net News Ledge: Climate change is rapidly heating up lakes around the world, threatening freshwater supplies and ecosystems across the planet, according to a study spanning six continents. More than 60 scientists took part in the research, published in the journal Geophysical Research Letters and announced at the fall meeting of the American Geophysical Union. Our knowledge of how lakes are responding to global change has been lacking, said Henry Gholz, program director in the Division of Environmental Biology...