Science

5. In general, a rural area or countryside is a geographic area that is located outside towns and cities.
7. A dune is a landform composed of wind- or water-driven sand. It typically takes the form of a mound, ridge, or hill.
11. fog or haze combined with smoke and other atmospheric pollutants.
12. the location where a creature lives
13. the presence in or introduction into the environment of a substance or thing that has harmful or poisonous effects.

1. the process by which fertile land becomes desert, typically as a result of drought, deforestation, or inappropriate agriculture.
2. cutting down the trees in a forest
3. rainfall made sufficiently acidic by atmospheric pollution that it causes environmental harm, typically to forests and lakes. The main cause is the industrial burning of coal and other fossil fuels, the waste gases from which contain sulfur and nitrogen oxides, which combine with atmospheric water to form acids.
4. when an area of land goes from barely being habited to being huge (population wise)
6. the process of eroding or being eroded by wind, water, or other natural agents.
8. Air quality is a measure of how clean or polluted the air is
9. a flow or flowing of water
10. Water quality can be thought of as a measure of the suitability of water for a particular use based on selected physical, chemical, and biological characteristics.