| Game Refuge |
United Nations, Glossary of Environment Statistics |
| Garbage |
United States Environmental Protection Agency, Office of Compliance and Assurance |
| Garbage |
United States Environmental Protection Agency, Terms of Environment |
| Gasahol |
United States Environmental Protection Agency, Terms of Environment |
| Gasification |
United States Environmental Protection Agency, Terms of Environment |
| Gasification |
United Nations, Glossary of Environment Statistics |
| Generally Recognized as Safe (GRAS) |
United States Environmental Protection Agency, Terms of Environment |
| Genetic Engineering |
United States Environmental Protection Agency, Office of Compliance and Assurance |
| Genetic Engineering |
United States Environmental Protection Agency, Terms of Environment |
| Genetic Engineering |
United Nations, Glossary of Environment Statistics |
| Genetic Resources |
United Nations, Glossary of Environment Statistics |
| Geographical Information System (GIS) |
United Nations, Glossary of Environment Statistics |
| Geomorphology |
United Nations, Glossary of Environment Statistics |
| Geothermal/Ground Source Heat Pump |
United States Environmental Protection Agency, Terms of Environment |
| Germicide |
United Nations, Glossary of Environment Statistics |
| Giardia Lamblia |
United States Environmental Protection Agency, Terms of Environment |
| Global Commons |
United Nations, Glossary of Environment Statistics |
| Global Warming |
United States Environmental Protection Agency, Office of Compliance and Assurance |
| Global Warming |
United States Environmental Protection Agency, Terms of Environment |
| Global Warming |
United Nations, Glossary of Environment Statistics |
| Global Warming Potential |
United States Environmental Protection Agency, Terms of Environment |
| Granular Activated Carbon Treatment |
United States Environmental Protection Agency, Terms of Environment |
| Green Accounting |
United Nations, Glossary of Environment Statistics |
| Green Ban |
United Nations, Glossary of Environment Statistics |
| Green Belt |
United Nations, Glossary of Environment Statistics |
| Greenhouse Effect |
United States Environmental Protection Agency, Office of Compliance and Assurance |
| Greenhouse Effect |
United States Environmental Protection Agency, Terms of Environment |
| Greenhouse Effect |
United Nations, Glossary of Environment Statistics |
| Greenhouse Gas |
United States Environmental Protection Agency, Terms of Environment |
| Greenhouse Gases |
United Nations, Glossary of Environment Statistics |
| Ground Water |
United States Environmental Protection Agency, Office of Compliance and Assurance |
| Ground Water |
United States Environmental Protection Agency, Terms of Environment |
| Ground-level Ozone |
United Nations, Glossary of Environment Statistics |
| Ground-level Pollution |
United Nations, Glossary of Environment Statistics |
| Ground-Water Discharge |
United States Environmental Protection Agency, Terms of Environment |
| Groundwater |
United Nations, Glossary of Environment Statistics |
| Groundwater Reservoir |
United Nations, Glossary of Environment Statistics |
| Guano |
United Nations, Glossary of Environment Statistics |
| Gully |
United Nations, Glossary of Environment Statistics |
