Energy, Government, and Defense magazines
- Island Ecosystems
- Isotopic Evidence for Extraterrestrial Non-Racemic Amino Acids in the Murchison Meteorite
- Johannesburg Summit on Sustainable Development
- Johnny Appleseed: A Pioneer Hero
- Julia "Butterfly" Hill Stands In A 200-Foot Tall Old-Growth Redwood Tree
- Keeling Curve
- Laboratory Methods in Environmental Science
- Lake Effect Snows
- Landfills
- Laws Don't Work if They're Only on Paper
- Lifestyle Changes
- Light Pollution
- Liquefied Natural Gas Resource Use
- Low Ozone Level Found Above Antarctica
- Man and Nature: Or, Physical Geography as Modified by Human Action
- Maps and Atlases
- Marine Debris Research Prevention and Reduction Act
- Marine Ecosystems
- Marine Fisheries
- Marine Water Quality