K
So what else could it have been?
Now infamous Polonium 210 is found in the Tobacco plant, and has the same alpha decay as Uranium. It's a lot less stable than Uranium - half-life of 138 days, as opposed to over 4 billion years - which means that 1 nanogram of Po-210 emits the same amount of radiation as 10 grams of Uranium. Naturally, the former amount is undetectable in the body and poses a negligible risk, while the latter is chemically lethal and it's radiation effects won't be even noticed.
If the availability of tobacco improved after the assault, if the habits of people changed in regards to tobacco products in a way that more people smoked, it could account for everything described in the study and more.
If it's chemical toxicity, we already discussed that lead, a very common metal, has largely similar effects. Plenty of other, also common metals are also known to be toxic, some also genetically. I find it infinitely more plausible that all the destruction brought to the city created dangerous aerosols with commonly present metals, which was then breathed in and genetically toxic than the amount of DU which Fallujah would warrant would be noticeable anywhere.
Someone ventured the (to my mind) fairly implausible claim that it might have been chlorine gas that the insurgents were using to build chemical weapons (hmmm.)
Chlorine gas isn't a known cancerogen, that is true. However given the limitations and flaws with the study, I find the conclusion that DU is a likely culprit rather unsupported.
Also, if DU is solely used against enemy armour, is that what the 7.62mm DU shell is used for?
There is no 7.62 mm DU shell. There is a 7.62 mm DU bullet, however. It's used for long range sniping. If it is still in use and if it was used in Fallujah (I haven't seen one bit of evidence for either) it could account for increased cancer rates in people hit by those bullets, but surviving the conflict. It is quite possible parts of the bullet will remain in the body and constitute a radiological hazard to that individual, but the danger to anyone else is virtually zero. Needless to say, the number of such individuals is insignificant and could not account for a measurable rise in cancer rates.
McHrozni