Subjects: Water-power--United States; Droughts--Government policy--United States; Hydroelectric power plants--United StatesBUSINESS & ECONOMICS / Real Estate / General
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Subjects: Environmental degradation; PollutionTECHNOLOGY & ENGINEERING / Environmental / General
Subjects: Pollution; Environmental degradation; Environmental protectionSCIENCE / Life Sciences / Ecology; NATURE / Ecology; NATURE / Ecosystems & Habitats / Wilderness
Subjects: Nature conservation; Environmental degradation; Environmental protectionSOCIAL SCIENCE / General; BUSINESS & ECONOMICS / Infrastructure
Subjects: Pollution; Environmental degradationTECHNOLOGY & ENGINEERING / Environmental / General
Subjects: Environmental protection; Environmental quality; Environmental degradationTECHNOLOGY & ENGINEERING / Environmental / General
Subjects: Environmental quality; Environmental degradation; Environmental protectionTECHNOLOGY & ENGINEERING / Environmental / General
Subjects: Environmental protection; Environmental quality; Environmental degradationSCIENCE / Environmental Science; NATURE / Environmental Conservation & Protection; NATURE / Ecosystems & Habitats / General