~ Climate change ~

The last decade of the 20th Century and the beginning of the 21st have been the warmest period in the entire global. Climate change is a long-term shift in the statistics it could show up as a change in climate normal for a given place and time of year, from one decade to the next. 

Global climate change poses a serious threat to lakes, streams, rivers, and wetlands. 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.