### action | geologic process:

Desertification
* Most desertification occurs as the result of natural processes.
  * The desert area in the world is getting bigger. Desertification usually happens on the edge of deserts. It is caused by a variety of factors.
* affects all types of agricultural lands
  - global climate change through soil and vegetation losses
  - in total, the lives of one-sixth of the world's population
  - over a billion people
* also affects air transport
  - has global significance
* are geological processes.
* can cause flooding, poor water quality, dust storms, and pollution
  - happen quickly, placing large numbers of people at great risk
  - result from poorly managed human intervention in the savannah
* caused by feral goats leaves little food or shelter for native animals
  - water erosion is also very severe
* challenge to developed as well as developing nations.
* complex phenomena whose effects are manifested socially.
* compounds the problem of water scarcity.
* continues to impact agricultural production.
* contributes to world hunger.
* describes the degradation of semiarid grasslands at the desert's edge.
* following the steady destruction of rain-forests growing menace.
* geologic process
* growing problem associated with overuse of poor lands.
* has environmental impacts outside of the areas in which it is occuring.
* implies soil erosion.
* involves the depletion of vegetation and soils.
* is also a threat in small areas at the extreme southern tip of Brazil
  - an on-going process on many areas of Earth
* is caused by a combination of factors that change over time and vary by location
  - climatic change
  - global cold, a severe environment, along with man-created sabotage
  - heavily a result of deforesation
  - most severe in Africa
  - of great concern in many parts of the world, yet people struggle to define it
  - part of a wider dilemma regarding land and water use in China
  - recognized as a major threat to biodiversity
* is the conversion of grasslands and croplands to desertlike conditions
  - impoverishment of terrestrial ecosystems under the impact of man
  - process of arable land changing into unproductive soil, or desert
  - result of a combination of overgrazing and water erosion
  - what happens to land when it becomes dried out and is no longer habitable
* land degradation problem of major importance in the arid regions of the world.
* leads to increased sediment loads in rivers, which harms wildlife.
* major problem in The Gambia.
* occurs as a result of natural forces and human forces.
* reduces the amount of land available for agriculture.
* result of environmental problems such as deforestation and soil erosion.
* serious threat, as is gradual salinization of the soils due to irrigation.
* social and economic as well as an environmental problem.
* specific phenomenon of arid, semiarid and day sub humid.
* takes many different forms across the vast Asian continent.
* takes place in Africa
  - drylands all over the world
* usually happens in semi-arid areas that border deserts

Diastrophism
* includes the processes of warping, folding and faulting.
* tectonic landform process that bends or breaks the earth.

Glaciation
* are environmental conditions
* begins in Antarctica.
* carves deep valleys.
* causes changes in sea level when seawater is taken up into the ice-sheets.
* is observed in the higher elevations.
* refers to the transformation of cloud particles from water droplets to ice crystals.

Geological process
* are extremely slow and very gradual
* can effect the formation, quality and fertility of mineral deposits.
* control the environment on every scale.
* drive tectono-eustatic change.
* is an action
* move elements around at the global as well as local levels.
* play an role in the movement of water in an area.

Good action
* are the results of good states.
* entail good results, and evil actions entail evil consequences.