- Ecological Footprint Quiz (interactive)
- Earth: Your Fragile Planet (slideshow)
- A Look at 20 Years of PLT GreenWorks (slideshow)
- The sole business of poetry (blog article)
- Carl Sagan – Cosmos – Cosmic Calendar (video)
- List of United States federal environmental statutes (website)
- Timeline of major U.S. environmental and occupational health regulation (website)
- EPA: Laws and Executive Orders (website)
- Digest of Federal Resource Laws (website)
- Environmental Laws & Treaties (website)
- Notable environmentalists (website)
- List of environmentalists (website)
- 11 important historical environmentalists (website)
- Ten pioneers in the American conservation movement (website)
- 50 people who could save the planet (website)
- Top ten most important environmental books (website)
- Caring for the planet (slideshow)
- What Did Rachel Carson Hear? (news article)
- Baltimore Public School Students Tackle Some Tough Environmental Problems (news article)
- The Grand Canyon: Natural Wonder or Next Great American Mall? (news article w/infographic)
- Words of Wilderness: 1836 – Present (video)
- Top 10 Earth Day Activities (website)
- Don’t Put a Price Tag on Nature (op-ed article)
- ODNR Division of Natural Areas & Preserves Calendar of Events (website)
