Geography

5. a course along which someone or something moves.
7. extreme scarcity of food.
8. a large naturally occurring community of flora and fauna occupying a major habitat, e.g. forest or tundra.
11. relating to economics or the economy.
12. the process of eroding or being eroded by wind, water, or other natural agents.
14. a fuel derived immediately from living matter.
16. the action of clearing a wide area of trees.
17. is he variety of plant and animal life in the world or in a particular habitat, a high level of which is usually considered to be important and desirable.
19. a body of permeable rock which can contain or transmit groundwater.
20. a small area with a relatively high temperature in comparison to its surroundings.

1. the surroundings or conditions in which a person, animal, or plant lives or operates.
2. the action of extracting something, especially using effort or force.
3. tourism that centers around awareness of the environment and the local community.
4. the process by which businesses or other organizations develop international influence or start operating on an international scale.
6. make (someone or something) different; alter or modify.
9. the basic physical and organizational structures and facilities (e.g. buildings, roads, power supplies) needed for the operation of a society or enterprise.
10. a biological community of interacting organisms and their physical environment.
13. practical work conducted by a researcher in the natural environment, rather than in a laboratory or office.
15. the line at which the earth's surface and the sky appear to meet.
18. abandon (a person, cause, or organization) in a way considered disloyal or treacherous.