Water Pollution in Alaska: Present and Future

the summer solstice and 2'° t the winter solstice. Alaska is the only state with pernia-frost, a permanently frozeni surface lay-er of earth. It is directly related to past and present climiate and causcs ag-gravating pI-oblenis of pollution, water supply, and construction. Distribution of permafrost is included in the dis-cussion on Alaska's ... ................
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