Associated Press: Climate change could worsen a litany of problems plaguing the Great Lakes, pushing water levels even lower, depleting fish populations and causing more storms that result in sewer overflows, advocates said Thursday. The Healing Our Waters-Great Lakes Coalition, which represents more than 100 groups, released a report that paints a dire picture as the U.S. Senate prepares for debate next week on proposed global warming legislation. The bill could represent a new source of …