Mix Of All Units

1. a place where a new idea or innovation first starts
7. saving a portion of land for farms, parks, and forests
8. watering crops and plants to help them grow when they don't get enough rain
9. variety of life
10. the mixing of different beliefs, practices, or ideas, from different cultures
12. the process of a society moving from agriculture to manufacturing and industry
13. judging other cultures based on your own culture's standards, assuming your way of life is the best
14. rapidly growing suburban cities
16. cultivation of only one single crop in a large land area
18. the process of people leaving one country to live in another
19. huge city with a population of 10 million or more

2. all the enterprises involved in producing food and cultivated products for consumer use
3. when someone moves from one country to another to live there permanently
4. the transformation of a neighborhood from low value to high value
5. a city with a population of over 20 million people
6. a process of land becoming more arid and desert-like
11. the commercial and business center of a city(downtown)
13. responsible traveling that saves the environment and improves the well-being of local people
15. the closer you are to a central place, the more expensive land will be
17. political boundary that once existed but no longer has a purpose