Across
- 2. demand the amount of food required to feed a population. Food demand increases as populations increase
- 4. supply the amount of food that is available to the population.
- 7. farming for the raising of livestock (particularly cattle)
- 10. the process or industry of obtaining coal or other minerals from a mine.
- 14. The use of Earth's renewable and nonrenewable natural resources in ways that do not constrain resource use in the future.
- 15. acidification refers to a decrease in the pH of the ocean over an extended period of time, caused primarily by uptake of carbon dioxide (CO2) from the atmosphere
- 16. A form of oxygen that has three oxygen atoms in each molecule; when not in the stratosphere, it is an unstable toxic gas with a pungent odor and powerful oxidizing properties
- 18. cultivation of a single crop in a given area.
- 19. reduction in the number or quantity of something
Down
- 1. urban air pollution composed of a mixture of smoke and fog produced from industrial pollutants and burning fuels
- 3. the process of removing salt from seawater
- 4. the capture of wild fish and other seafood living in the waters
- 5. the process by which fertile land becomes desert, typically as a result of drought, deforestation, or inappropriate agriculture.
- 6. the practice of growing, breeding, and caring for plants and animals that are used for food, clothing, housing, transportation, and other purposes
- 8. The science of planting and caring for forests and the management of growing timber
- 9. Organisms that have been genetically altered to improve their usefulness
- 11. an increase in the ratio or density of people living in urban areas rather than in rural areas
- 12. ecosystem refers to the biosphere, or all the spaces on earth occupied by living organisms
- 13. treatment the process of removing contaminants from wastewater to make it safe enough to release into the environment
- 17. an undesirable in the natural environment that is caused by the introduction of substances that are harmful to living to organisms or by excessive wastes, heat, noise, or radiation