Globe and Mail: The water levels of Lake Huron and Lake Michigan have been falling steadily compared with those on Lake Erie, and no one knew why. But a major report financed by the U.S. and Canadian governments suggests an answer: The fingerprints of climate change are starting to be found in the Great Lakes, the world’s largest body of fresh water, causing a discernible drop in their levels. The report, released Tuesday, estimated that Lake Huron and Lake Michigan have fallen about a quarter …