EESA10H3 Lecture Notes - Lecture 4: Lake Ontario, Persistent Organic Pollutant, Biomagnification
19 Jun 2013
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Water can be turbid but not necessarily toxic. Purify water ==> the one we drink is from lake ontario. Filtering - can"t filter viruses, some chemicals (microscopic stuff) Prescribed to pregnant women to those who had problems w/ miscarriages; prevents miscarriages. The children when becoming parents, they had problems. We don"t know problem today when exposed, we only find out years later. **remember these weren"t learned from human experiments, only animals but they still give info** Body breaks down these chems, excretes} thus, not stable over time. Can have these chems in body but undetectable. Chlorination makes chem more dangerous; more cl, more dangerous. After combustion, settles on different areas (ex. Not soluble in water, but accumulate in fat tissue. If mother exposed, child can be born w/ birth defects. Agri pesticide + also used as insecticide (controlling malaria & typhus) Ddt considered as miracle since they found it could be used as insecticide.
