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> There was a decline in motility by 30 per cent [in dogs], and what's interesting is it parallels similar observations carried out on human sperm

30 percent is a lot for such low levels of the chemicals.

Many endocrine disruptors have U shaped 'potency' curves. In practice this means that in very small amounts the body treats it as a hormone signal, in medium amounts there is almost no response, and in high amounts it will be toxic. This U shaped curve is what makes the small amounts that leech from everywhere very serious. The bodily response is much more complex than "more is worse"

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