Across
- 3. animal droppings used to fertilize land
- 5. an increase in the worlds temperature
- 7. a layer of gas above the Earths surface
- 8. money used to invest in business
- 9. world-wide
- 11. a complete change in something; the overthrow of a government
- 13. land held to be used by everyone
- 14. to use
Down
- 1. new inventions; the science of industry
- 2. animal food
- 4. a supply of workers
- 5. to feed on growing plants, such as grass
- 6. unproductive; inadequate in performance
- 10. to sow seeds by throwing them over a field by hand
- 12. a group of animals distinguished by particular characteristics