People and Nature

5. A sudden and violent event in nature that causes great damage and loss of life.
6. A substance that pollutes something, especially water or the atmosphere.
8. Avoiding the depletion of natural resources to maintain an ecological balance.
10. The protection of animal species and their natural environments.
11. The amount of carbon dioxide emitted due to the consumption of fossil fuels.
13. When a resource is not depleted when used.
15. The natural home or environment of an animal, plant, or other organism.
17. A collective term for harmful impacts of human activity on the environment.
18. The periods of the year distinguished by special climatic conditions.
19. A way of life that attempts to reduce the use of the Earth's natural resources.
21. Species of plants and animals that are in danger of becoming extinct.
22. The protection of animals, plants, and natural resources.
23. Procedures performed on living animals for purposes of research.

1. The practice of abstaining from the consumption of meat and poultry.
2. The state of the atmosphere at a particular place and time.
3. A diet and lifestyle that avoids all animal products.
4. Able to perceive or feel things.
7. The action of clearing a wide area of trees.
9. Capable of being decomposed by bacteria or other living organisms.
12. The illegal hunting or capturing of wild animals.
14. The practice of performing operations on live animals for scientific research.
16. Not harmful to the environment.
20. A biological community of interacting organisms and their physical environment.