Human thyroid functions at risk in exposure to fracking fluids
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By Summit Voice
FRISCO — Exposure to the semi-secret brew of chemicals used for fracking blocks hormone receptors and interferes with other other functions that regulate basic body chemistry, scientists said this week, announcing the results of a study that identifies specific health outcomes related to the poisons.
Some chemicals exceed limits set to protect human health
By Summit Voice
FRISCO — Even the Northwest’s mighty Columbia River isn’t immune to persistent chemical pollution federal scientists said last week, publicizing a new study that found fish with traces of pesticides and PCBs at levels that raise health concerns.
The data have been sent to state health officials in Oregon and Washington who will evaluate the new information to determine exactly how much of the resident fish are safe to eat.
Endocrine disrupting chemicals include man-made products such as pesticides and plasticizers. They’re also found in food, indoor and outdoor environments, and a wide range of consumer products.
Adverse effects increasingly linked to exposure to chemicals with endocrine disrupting properties include: effects on reproduction, such as infertility and reduced sperm count and viability; breast, mammary, testicular, and prostate cancers; type 2 diabetes, obesity, and heart disease; neurobehavioral outcomes; and thyroid and immune system dysfunction. Continue reading “Health officials urge action on endocrine disrupting chemicals”→
New study shows estrogen from various sources is impacting fish in UK rivers
By Summit Voice
SUMMIT COUNTY — More research from the UK is showing that remnant chemicals from birth control pills, hormone therapy drugs, plastics manufacturing and other sources — collectively known to contain endocrine disrupting chemicals — are bending the gender of fish.
The new study, led by the universities of Exeter and Brunel, shows those chemicals can have a significant impact on the ability of fish to breed in UK Rivers.
“This is the first time we’ve seen firm evidence that the intersex fish, males that have been feminised by EDCs, have a reduced ability to breed,” said Charles Tyler, from the University of Exeter‘s Biosciences department. “Clearly this raises concerns about the implications on the future for wild fish populations living in UK rivers, but there’s also much wider issues raised by these findings. Some of the effects seen in fish could occur in other animals too as hormone systems are quite similar across all vertebrates.
“EDCs have been tentatively linked with human health impacts too, including, falling sperm counts and cardio-vascular disease. These findings remain more controversial,” Prof Tyler added. “In contrast, we have shown, unequivocally that environmental estrogens alter sexual development in fish and now, through this study, that this can impact on their ability to breed.” Continue reading “More bad news on ‘gender-bending’ water pollutants”→