| Lacustrine |
United Nations, Glossary of Environment Statistics |
| Lagoon |
United States Environmental Protection Agency, Office of Compliance and Assurance |
| Lagoon |
United States Environmental Protection Agency, Terms of Environment |
| Lagoon |
United Nations, Glossary of Environment Statistics |
| Land Disposal Restrictions |
United States Environmental Protection Agency, Terms of Environment |
| Landfill |
United States Environmental Protection Agency, Office of Compliance and Assurance |
| Landfill |
United Nations, Glossary of Environment Statistics |
| Landfills |
United States Environmental Protection Agency, Terms of Environment |
| Landscape |
United States Environmental Protection Agency, Terms of Environment |
| Landscape Ecology |
United States Environmental Protection Agency, Terms of Environment |
| Latency |
United States Environmental Protection Agency, Terms of Environment |
| LC 50/Lethal Concentration |
United States Environmental Protection Agency, Terms of Environment |
| LD 50/ Lethal Dose |
United States Environmental Protection Agency, Terms of Environment |
| LD50 |
United Nations, Glossary of Environment Statistics |
| Leachate |
United States Environmental Protection Agency, Office of Compliance and Assurance |
| Leachate |
United States Environmental Protection Agency, Terms of Environment |
| Leachate |
United Nations, Glossary of Environment Statistics |
| Lead |
United Nations, Glossary of Environment Statistics |
| Lead (Pb) |
United States Environmental Protection Agency, Terms of Environment |
| Legionella |
United States Environmental Protection Agency, Terms of Environment |
| Lethal Concentration 50 (LC 50) |
United States Environmental Protection Agency, Office of Compliance and Assurance |
| Lethal Dose 50 (LD 50) |
United States Environmental Protection Agency, Office of Compliance and Assurance |
| Life Cycle of a Product |
United States Environmental Protection Agency, Terms of Environment |
| Lifetime Average Daily Dose |
United States Environmental Protection Agency, Terms of Environment |
| Lifetime Exposure |
United States Environmental Protection Agency, Terms of Environment |
| Limit of Detection (LOD) |
United States Environmental Protection Agency, Terms of Environment |
| Limnology |
United States Environmental Protection Agency, Terms of Environment |
| Limnology |
United Nations, Glossary of Environment Statistics |
| Lindane |
United States Environmental Protection Agency, Terms of Environment |
| Lithology |
United States Environmental Protection Agency, Terms of Environment |
| Lithosphere |
United Nations, Glossary of Environment Statistics |
| Litter |
United States Environmental Protection Agency, Terms of Environment |
| Littoral Zone |
United States Environmental Protection Agency, Terms of Environment |
| Loading |
United Nations, Glossary of Environment Statistics |
| Long-range Transport of Air Pollutants (LRTAP) |
United Nations, Glossary of Environment Statistics |
| Low-Level Radioactive Waste (LLRW) |
United States Environmental Protection Agency, Terms of Environment |
| Low-level Radioactive Wastes |
United Nations, Glossary of Environment Statistics |
| Lower Detection Limit |
United States Environmental Protection Agency, Terms of Environment |
| Lower Explosive Limit (LEL) |
United States Environmental Protection Agency, Terms of Environment |
| Lowest Observed Adverse Effect Level (LOAEL) |
United States Environmental Protection Agency, Terms of Environment |
