Considering that the Geneva conventions have nothing to do with weapons, I would venture to guess that DU is not mentioned in them. If you really wanted to find some sort of big name treaty that the US is violating, I would recommend looking in the Hague Conventions. Unfortunately, those came out in 1899 and 1907 before DU was even fathomed as a weapon.

But yes, Rabble, rabble rabble, US, rabble, rabble Geneva conventions, rabble rabble.

Considering that the vast majority of tank battles of desert storm and OIF1 occurred in the deserts of south-western Iraq, I would venture to suggest that DU isn't hurting that many people.