Other estimates that I have seen (from a too-quick web search) estimate that worldwide malaria deaths currently are in the range from one to 1.5 million per year. I haven't found a worldwide estimate for the time period of "five years after DDT was banned under pressure from U.S. regulators" (since I don't know what year that is). So I can't pass judgement on whether or not those figures are grossly inflated.
But if I were in the mood to do some political muckraking, I'd publish and distribute newsletters among "peoples of color" informing them that most deaths from malaria occur in "peoples of color", and Lieberman and his Democrat enviromentalist comrades have no interest in helping those people because of they are of the wrong race...
In fact, if Lieberman's efforts are successful, millions of people of color will die.(rhetorical argument follows - don't try this at home) And, if I were a Terry McAuliffe or James Carville type (namely, a race-baiting, shameless liar), which I am not, then I would consider spicing up the account by pointing out that Lieberman is a Jewish Democrat, and he is doing this because the Jewish Democrats have a history of oppressing people of color, and this is just more of the same. That would be a disgusting and pernicious lie, of course, but when has that ever stopped a Democrat/Commie? So, wouldn't turnabout be fair play (he wondered to himself)?