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09 BIOMASS FUELS
14 SOLAR ENERGY
54 ENVIRONMENTAL SCIENCES
AQUATIC ECOSYSTEMS
ECOSYSTEMS
ENERGY SOURCES
ENVIRONMENTAL IMPACTS
ENVIRONMENTAL QUALITY
FUELS
HARVESTING
HYDROLOGY
MAINE
NORTH AMERICA
NORTH ATLANTIC REGION
POLLUTION
POWER PLANTS
RESOURCES
THERMAL POWER PLANTS
USA
WATER POLLUTION
WATER QUALITY
WATER REQUIREMENTS
WATER RESOURCES
WATER SUPPLY
WOOD
WOOD FUELS
WOOD-FUEL POWER PLANTS