Air -- Pollution -- Research 3 Climatic changes -- Research -- United States 3 Emergency management -- United States 3 Particles -- Environmental aspects -- Research 3 Particles -- Health aspects -- Research 3 United States. -- Dept. of Energy 3 Air quality management -- United States 2 more ... Aircraft exhaust emissions -- Environmental aspects -- Research -- Evaluation 2 Aquatic ecology 2 Atmospheric chemistry 2 Climatic changes 2 Climatic changes -- Congresses 2 Climatic changes -- Forecasting 2 Climatic changes -- Mathematical models 2 Climatology 2 Coastal ecology -- Research -- United States 2 Energy budget (Geophysics) 2 Fluid dynamics 2 Geodynamics 2 Geographic information systems 2 Geological Survey (U.S.) 2 Glen Canyon Dam (Ariz.) 2 Global Energy and Water Cycle Experiment 2 Groundwater -- Purification 2 Hazardous waste site remediation -- United States 2 Hydrologic cycle 2 Marine mammals 2 Nuclear facilities -- Decommissioning -- United States 2 Nuclear weapons -- Testing -- Detection -- Research 2 Numerical weather forecasting -- United States 2 less ...