Energy, Government, and Defense magazines
- Halocarbons
- Halogenated Fluorocarbons
- Heat Waves
- Historic Preservation (World Heritage Sites)
- Hockey Stick Controversy
- Holes in Ozone Layer of Earth
- How to Conserve Water and Use It Effectively
- HR3515-Medical Waste Tracking Act of 1988
- Human Impacts
- Hunting Practices
- Hurricanes
- Hurricanes
- Hurricanes: Katrina Environmental Impacts
- Hybrid Vehicles
- Hydrocarbons
- Hydrofluorocarbons
- Hydrogen Economy
- Hydrothermal Processes
- Ice Core Research
- Ice Cores