Article Photos: As Great Lakes plummet, towns try to save harbors 2/4

  In this Nov. 16, 2012 photo, a sand bar is exposed by low water on Portage Lake in Onekama, Mich., which has made nearby docks and marinas largely unusable. The waterway is connected by a channel to nearby Lake Michigan, where levels are approaching record lows. The Great Lakes, the worldâs biggest freshwater system, are dropping because of drought and climbing temperatures, a trend that accelerated with this yearâs almost snowless winter and scorching summer. (AP Photo/John Flesher)