From NYT's Kristof

"...the U.S. and other rich countries are siding with the mosquitoes against the world's poor -- by opposing the use of DDT...In the 1950's, 60's and early 70's, DDT was used to reduce malaria around the world, even eliminating it in places like Taiwan. But then the growing recognition of the harm DDT can cause in the environment -- threatening the extinction of the bald eagle, for example -- led DDT to be banned in the West and stigmatized worldwide. Ever since, malaria has been on the rise...But most Western aid agencies will not pay for anti-malarial programs that use DDT, and that pretty much ensures that DDT won't be used...."

From Wikipedia

"Greenpeace supports the Stockholm Convention on Persistent Organic Pollutants, a legally binding international agreement which aims to phase out substances such as DDT. Both the Stockholm Convention and Greenpeace allow DDT to be used for malaria control. However, according to Roger Bate, a libertarian critic of Greenpeace, the organization's campaign to shut down the last major DDT factory in the world located in Cochin, India, would make the eradication of malaria more difficult for poorer countries. Robert Gwadz of the US National Institutes of Health said in 2007, "The ban on DDT may have killed 20 million children."

Although others claim that this isn't true.