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Comprising 39.9 million acres, lakes and reservoirs are a major water resource in this country. Freshwater inland lakes and reservoirs provide our nation with 70% of its drinking water and supply water for industry, irrigation, and hydropower. Lake ecosystems support complex and important food web interactions and provide habitat needed to support numerous threatened and endangered species. Lakes are also the cornerstone of our nation's 19 billion dollar freshwater fishing industry, form the backbone of numerous State tourism industries, and provide countless recreational opportunities.