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Politics : Formerly About Advanced Micro Devices

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To: combjelly who wrote (930891)	4/18/2016 11:20:43 AM
From: bentway	Read Replies (1) of 1572644

The DDT proponents go all crickets when it's pointed out that DDT was banned because it caused super-thin eggshells in birds, especially top level predator birds, like bald eagles. It's like they WANT to extinct America's national bird! Just persistent science denial. en.wikipedia.org DDT is toxic to a wide range of living organisms, including marine animals such as crayfish, daphnids, sea shrimp and many species of fish. DDE caused eggshell thinning and population declines in multiple North American and European bird of prey species. [56] Eggshell thinning lowers the reproductive success rate of certain bird species by causing egg breakage and embryo deaths. DDE-related eggshell thinning is considered a major reason for the decline of the bald eagle, [14] brown pelican, [57] peregrine falcon and osprey. [1] However, birds vary in their sensitivity to these chemicals. [7] Birds of prey, waterfowl and song birds are more susceptible than chickens and related species. DDE appears to be more potent than DDT. [1] Even in 2010, California condors that feed on sea lions at Big Sur that in turn feed in the Palos Verdes Shelf area of the Montrose Chemical Superfund site exhibited continued thin-shell problems. Scientists with the Ventana Wildlife Societyand others study and remediate the condors' problems. [58]

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