Physical Environment

1. placed on the soil surface to reduce evaporation losses and reduce weed growth.
2. A measure of the reflectivity of a surface
5. is a process in which small particles in a liquid clump together . This is used in a variety of industries, including water treatment.
7. A device that reduces emissions of pollutant gases (e.g. NOx) from petrol and diesel engines.
8. the process of landscaping, or gardening, that reduces or eliminates the need for irrigation.
9. Any process which removes carbon dioxide from the atmosphere, such as afforestation or underground storage (carbon capture).
10. Adjective describing outcomes caused by human activities.
12. The deposition of mineral deposits from hot mineral-rich solutions.
13. A solid compound of methane trapped in ice crystals, often found in marine sediments.
14. is reached when the changes caused by human activities cause further changes such that the human activities are no longer needed to maintain the changes.

1. The international agreement that controlled the manufactured and use of CFCs and other ozone depleting substances.
3. A balance created by active processes whose impacts cancel each other out.
4. A method to reduce carbon dioxide emissions, by removing the gases and storing them in underground geological structures.
6. A measure of the salt concentration of a solution.
11. Geological processes that change the form of a rock with heat and/or pressure, but without melting it.