DDT is villianized far out of proportion these days. Although admittedly they are both POPs, setting it rhetorically alongside Agent Orange as though they are the same is absurd.
DDT's carcinogenic properties are not really all that serious. We expose ourselves to more carcinogenic substances all the time, such as gasoline fumes. These minor effects were played up by DDT's opponents back in the day to scare people into accepting a DDT ban. Similarly, the acute toxicity is minor. To my knowledge, there's only one case where someone died from consuming DDT, and in that case the DDT may have contained other harmful chemicals.
On the other side of the coin, DDT saved millions of lives by eliminating malarial mosquitoes and other harmful insects. It easily saved more lives than it took.
Agent Orange on the other hand has caused awful damage in the areas where it was used extensively. If DDT was even close to as dangerous as it was made out to be by its opponents, then the present day impacts would be like a worldwide version of the Agent Orange boondoggle...times 1000.
Source: http://rss.slashdot.org/~r/Slashdot/slashdotScience/~3/-U-Usn9VSAU/story01.htm
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