Across
- 4. animal droppings used to fertilize land
- 8. unproductive; inadequate in performance
- 10. a supply of work
- 11. a complete change in something; the overthrow of a government
- 14. an increase in the world's temperature
Down
- 1. the essential materials needed in an industry to make a product
- 2. a layer of gas above the Earth's surface that protects human beings from harmful rays of Sun
- 3. to use
- 5. animal food
- 6. a group of animals distinguished by particular characteristics
- 7. an economy based on industry, not agriculture
- 9. new inventions; the science of industry
- 12. land held to be used by everyone
- 13. money used to invest in business
- 14. world-wide