EESA10H3 Lecture 4: Environmental Lecture 4.doc
7 Oct 2014
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Health and the environment: lecture 4: roots of exposure; inhalation, ingestion, through the skin, marked on arguments to support decision, midterm; lecture 1-6. Chemical body burdens: body burden is 100"s of chemicals in environment, everyone has some chemicals in their system, our body fights back. Metabolize, release through excrement, break it down: particular chemical accumulates in particular parts of body. Arsenic in nails and hair: technology exists to determine levels, bi-monitoring; taking 1000"s of samples and analyzing, based on volunteers; maps of regions of existing diseases; monitor areas. Normal level"; individuals who are not extremely exposed to chemicals. Organochlorine substances: both organochlorines, disruptors, found in our body, resistant organic pollutants; don"t easily break down; stay like they are for a long period of time, difference between pollutants and contaminants. Pollutants; elevated amount present that always cause harm and impacts human health. Contaminants; an elevated amount but not always causing human damage; co.
