The governors of the eight Great Lakes states are meeting next week with the premiers of Ontario and Quebec to consider ways to make sure that water from the lakes stays in the region. All is not hunky-dory in the five lakes, which contain 20 percent of the world’s freshwater. The lakes are at their lowest levels in half a century and global warming could bring them still lower. Some in the region are concerned that water-hungry states like Florida, Texas, and California, which have great political clout, might try to tap the Great Lakes as a source of water in the not-too-distant future. Activists this year have also had to fight back calls to allow oil and gas drilling under the lakes. And let’s not even get into the problem of invasive species in the lakes …