Global climate change poses a serious threat to lakes, streams, rivers, and wetlands throughout the United States, according to this report from the Pew Center on Global Climate Change. The temperature increases and variations in weather patterns projected for the next 100 years will result in changes in the geographic distribution of freshwater fish, interfere with the reproduction of many aquatic species, reduce water quality, and impose added stresses on wetlands and other sensitive aquatic ecosystems.
Pew is no longer active in this line of work, but for more information, visit the Center for Climate and Energy Solutions site.