Across
- 3. Commonly known greenhouse gas
- 5. Produces an estimated 80% of the world's oxygen
- 6. Earth Day was inspired by these protests
- 8. Creator of Earth Day
- 9. Dead dinosaurs, algae, and other plants
Down
- 1. The animal in the WWF logo
- 2. Colorful underwater ecosystems
- 4. World's largest rainforest
- 7. Nixon's environmental legislation