BIOL 2050 Chapter Notes - Chapter 25: Biogeochemical Cycle, Fossil Fuel, Nitrogen Cycle
4 Oct 2016
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Document Summary
Dust storms of epic proportions: a case study. Dust s usually subtly nuisance for most cities. 1934 dust storm hit american cities: chicago and new york. Many people in these areas suffered fatal dust induced pneumonia. China has faced many dust storms: april 2006 more than 300000 tons of dust fell, residents encouraged to stay in doors, face masks to protect lungs. These are perceived as rare events: possibly linked to practices of unsustainable land use, associated with droughts as well. Dust particles made up of soil particles, thus redistribution of soils from one area to another has potential to cause ecological change. Movements of biological important elements are linked at global scale. Humans increasingly changing physical and chemical environment. Atmospheric emissions of pollutants, dust, greenhouse gases: causes widespread environmental problems. Major focus of global ecology: study of the environmental effects of human activities. Follow the biogeochemical cycling of c, n, p and s at global scale.
