Index - R

Race/ethnicity, 6

Radiation, 152-157, 153(f8.7)

Radio frequency (RF) energy, 155-156

Radioactive waste. See Nuclear waste

Radon, 152-155, 154f

Rags, 58-59

Rain forests, 170-171, 189, 189t

RCRA (Resource Conservation and Recovery Act), 53-56, 61

RDF (refuse derived fuel) systems, 196-197

Reclamation, 68, 178

Recovery. See Recycling

Recreation
     mountains, 180
     water use, 109

Recycling
     history, 58-59
     municipal solid waste, 64, 64f, 65f

Redevelopment, 68

Reformulated gasoline (RFG), 87-88

Refuse derived fuel (RDF) systems, 196-197

Remediation, brownfields, 68

Renewable energy
     alternative fuels, 91-94, 91t, 92t, 93f, 94f, 94t, 95t
     bioenergy, 192, 195-197, 197f
     biomass conversion, 195
     consumption, 192(f10.2), 195f, 196f
     ethanol and methanol, 195-196
     future of, 207, 208
     geothermal energy, 200-203
     history, 191-192
     hydrogen, 92-93, 207
     hydropower, 197-199
     municipal solid waste (MSW), 196-197
     ocean thermal energy conversion, 200
     as percent of total energy consumption, 192(f10.2)
     solar energy, 205-207, 205f, 207f
     tidal power, 200
     wave power, 200
     wind energy, 203-205
     wood, 195
     See also Energy

Replanting, forest, 175

Replenishment, beach, 181

Residential Lead-Based Paint Hazard Reduction Act, 148

Resource Conservation and Recovery Act (RCRA), 53-56, 61

Reynolds, R. J., 159-160

RF (radio frequency) energy, 155-156

RFG (reformulated gasoline), 87-88

Rio Summit. See Earth Summit of 1992

Rivers, 105-107

Roadless Area Conservation Rule, 175

Roads and wildlife, 186