LIFESCI 2H03 Lecture Notes - Smog, Rill, Urban Air
11 Jun 2013
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Document Summary
Deterioration of the environment impacts of disturbance of change in the environment leading to negative impacts. Quality of air, soils, sensitive ecosystem (wetlands), wildlife. Soil degradation: many causes serious concern as the global population is increasing. Over the past 50 years: has reduced global grain production by 13% Happening at unusually high rates too much agriculture, overgrazing (supporting growth of live stocks) and deforestation if we remove the root system of plants there is an acceleration in the rates of erosion. Soil erosion: a global problem top soil (rich in organic material) is disturbed by increasing winds. Erosion by the movement of water due to loss of plant cover sheet erosion rill erosion carve trenches bringing soils away from areas that require this soil. Gully erosion storm will increase in intensity, higher precipitation and will cause more rill and gully erosion due to more water movement.
