AUENV120 Lecture Notes - Lecture 7: Escherichia Coli, Swift Fox, Soil Conservation

• School: University of Alberta
• Department: Augustana Faculty - Environmental Studies
• Course: AUENV120
• Professor: Glen Hvenegaard

Document Summary

Social implication: settlements, material goods, specialization, resource conflict, pollution. Societies increased due to agriculture: more food = more land used, by 1960s most productive land was used. Modern farming systems: green revolution - does not mean environmental friendly but rather increase in yield. But how was this possible: technological advances. Greater mechanization; modern tractors, mechanized food processing: gmo (genetically modified organisms) In order to increased stalled crop yields, produce is genetically modified. For example, tomatoes are modified so they can tolerate low temperatures: transgenic crops. When a single species contains dna from at least one other species. For example, bacillus thurigiensis that has toxin ~ insecticide is now part of gm crops. They produce these toxins on their own = no need for insecticide. - no wonder they have increased yield because they are able to contend with unfavourable weather conditions, and other factors affecting crop yield.