Across
- 5. Founded first National Park (Yellowstone) as well as Sequoia and Yosemite National Parks.
- 6. Setting aside undisturbed areas, protecting them from human activities that might alter their natural state.
- 11. was drafted at the 1992 Earth Summit addressing global warming.
- 12. Published Silent Spring in which she told about how chemicals like pesticides and insecticides were contaminating the environment.
Down
- 1. The sensible and careful management of natural resources.
- 2. Founded the Sierra Club in 1892.
- 3. received a Nobel Peace prize in 2007 for his efforts to spread the information about climate change in his documentary An Inconvenient Truth.
- 4. Day to celebrate supporting the earth and its environment.
- 7. Got people interested in the wildlife of North America through his paintings.
- 8. Wrote of our duty to protect the balance of nature.
- 9. Wrote Walden, in which he emphasized the harmony that humans can find when living in nature.
- 10. Set up the Endangered and Threatened Species Acts to protect wildlife from destruction.