Ah, Nature. That we can check. Here's what Hazeltine's letter says about that correlation:In other words, one study actually showed that DDT made eggshells thicker, but that was just 9 eggs. But the fact that the study exists means people who are wrong can keep citing it forever."The CFDG data (Table 1) show a nearly perfect correlation of lipid DDE residues to shell thicknesses, and the relationship is positive."OK, that's not exactly what Milloy had, but the point is that the correlation goes the wrong way. Trouble is, Milloy fails to mention that there were four responses to Hazeltine published in Nature. Let me summarize some of the problems with Hazeltine that these letters pointed out. First, Hazeltine's CFDG data comprised just nine eggs. Those eggs mere a mixture of incubated and non-incubated, and the positive correlation is caused because incubated eggs have thicker shells and higher DDE concentration in the lipid. How? Well, incubation consumes most of the lipid and concentrates DDE in the remaining lipid. And thin eggshells are less likely to survive incubation (that's the reason why eggshell thinning is a problem in the first place.) If you look at the relationship between whole egg DDE and eggshell thickness there is no statistically significant relationship in Hazeltine's set of just nine eggs. But other studies with larger samples have found a significant negative relationship between DDE and brown pelican eggshell thickness. Unlike Milloy, Hazeltine cites them in his paper and states:
That DDE is the cause is of thin brown pelican or peregrine eggs is well established in the ... scientific literature."Hazeltine tried and failed to overturn this. Milloy misrepresented the science by deliberately concealing the existence of the studies that found that there was a correlation between eggshell thinning and DDE.
Yeah, and would you rather get strangled to death, or just punched in the face? Punched in the face, you say? Well, well, well, look who's all punch-my-facey when the chips are down! And from this I conclude that you prefer getting punched in the face to any other possible event. Q.E.D.What I'm saying is that eating McDonalds is not a punch in the face. There is just so much drama around food. Is fast food the greatest thing ever for a body? Probably not. But it's not the worst thing ever. It's not poison, and the people who eat it are neither stupid nor victims.
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posted by floam at 6:08 PM on December 22, 2010 [2 favorites]