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We should all be skeptical about what information is released by the government, since they protect business at the expense of the populace. The EPA should now be renamed the Environmental Pollution Agency, since that is their underlying goal now that the corporations control the government.
While Anonymous seems to have experience in the matter, (though if he gave his credentials, it might be more convincing - he could be an industry lobbyist, after all) the main point I got from his letter is that US citizens are exposed to carcinogens in every setting, not because it is normal or relatively free from health risks, but because of governmental and institutional support for exploitative capitalism. You are right, Anonymous, we are all at risk.