I find the info about DDT in this article to be fascinating.
I agree. God save us from environmentalists and other do-gooders.
Then you might be interested in this:
http://www.junkscience.com/malaria_clock.htm
(Not that there's anything wrong with that!)
One problem with DDT (or at least its ban) is that the half life of DDT is much smaller in tropical climates than in temperate or arctic climates. Thus, the environmental hazards are least where DDT is needed most. (Note that Minnesota Mosquitos aren't as efficient killer bearers as those in Africa.)
Perhaps a policy of targeted applications would be more helpful. (Spray the bug, not the tree?) Standing water, areas of mosquito infestation, etc. could be more agressively targeted, especially in the tropics.