Across
- 1. an overflow of water that submerges land that is usually dry.
- 4. the process of converting waste materials into new materials and objects.
- 10. ability to exist constantly
- 11. ...... effect- the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without this atmosphere.
- 12. the broadest sense, is the natural, physical, or material world or universe.
Down
- 2. threatens ocean health by reducing fish stocks.
- 3. a type of land degradation in drylands in which biological productivity is lost due to natural processes or induced by human activities whereby fertile areas become increasingly arid.
- 5. a colorless gas with a density about 53% higher than that of dry air.
- 6. a persistent body of dense ice that is constantly moving under its own weight.
- 7. unwanted or unusable materials, any substance which is discarded after primary use, or is worthless, defective and of no use.
- 8. the introduction of contaminants into the natural environment that cause adverse change
- 9. a violently rotating column of air that is in contact with both the surface of the Earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloud.
