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Lecture 5

EESA10 Lecture 5 Video: The Disappearing Male Documentary

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University of Toronto Scarborough
Environmental Science
Jovan Stefanovic

EESA10 HUMAN HEALTH AND ENVIRONMENTThe Disappearing Male DocumentarySperm worldwide have been cut in half in half over the last 50 yearsSperm abnormalities and the rates of male infertility have radically increasedRates of testicular cancer has doubled over the last 20 yearsIt is believed that certain manmade chemicals in products interfere with the male hormonal system These chemicals are everywhereSince 60 years ago chemical industry has developed 90000 manmade compounds and a vast majority of them have never been tested for their effect on human beingsChemicals are found in virtually every consumer productBisphenol A make plastic hard and unbreakablePhthalates make plastic soft and pliableSome synthetic chemicals are more damaging to boys but for reasons not really unknownTypical young man produces less than half the amount of sperm his father did and up to 85 of this sperm is abnormalThis change has been sudden and dramaticWHO for classifying a man as infertile have moved downwardsfirst it was 60 millionmL then down to 40 millionmL now its 20 millionmL and theyre talking about putting it down to 10 millionmLThree things used to determine sperm quality volume sperm count speed motility and morphologyFlorida lakesold chemicals like DDT and pesticidesSexual organs of alli
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