"Malaria-endemic countries can continue using dichlorodiphenyltrichloroethane (DDT) to help control malaria due to an exemption clause in a convention banning the controversial substance. The Stockholm Convention on Persistent Organic Pollutants which came into force on 17 May, following its ratification by 50 states, outlawed the use of 12 industrial chemicals — dubbed the "Dirty Dozen," — including DDT.

The exemption clause allows malaria-endemic nations to use DDT strictly for indoor residual wall spraying (IRS): a measure which contributed to slashing the number of malaria cases in South Africa from 64 622 in 2000 to 8016 last year

"Malaria is now at its lowest level in ten years," said Rajendra Maharaj, a specialist scientist working with South Africa's national malaria control programme. "We attribute that to DDT."

Under pressure from environmentalists, South Africa suspended DDT for IRS in 1996 after five decades of use and switched to another class of insecticide known as pyrethroids. But the 1999–2000 malaria epidemic in KwaZulu-Natal and neighbouring provinces prompted the government to revert to DDT for prevention and to introduce artemisinin-based combination therapy for treatment."
http://www.scielosp.org/scielo.php?script=sci_arttext&pid=S0042-96862004000600018&lng=pt

Here is more of what Steve Milloy says [which your idol, Tim Lambert didn't]:
"Resistance" may be a misleading term when discussing DDT and mosquitoes. While some mosquitoes develop biochemical/physiological mechanisms of resistance to the chemical, DDT also can provoke strong avoidance behavior in some mosquitoes so they spend less time in areas where DDT has been applied -- this still reduces mosquito-human contact."
http://www.junkscience.com/ddtfaq.htm

The simply fact is that environmentalism has "worked" to prevent a harmless and cheap way to vastly reduce the death caused by malaria. Malaria causes a lot deaths per year to children. The sole reason for the death millions of children can accurately be said to caused by environmentalism. Malaria of course doesn't solely cause death but causes a massive amount of suffering. There is not other substance as safe and effective as DDT. Other substances are more toxic to humans and the general environment, more expensive, and not as effective as DDT.

"Abstract
Pyrethroid insecticides have been used for more than 40 years and account for 25% of the worldwide insecticide market. Although their acute neurotoxicity to adults has been well characterized, information regarding the potential developmental neurotoxicity of this class of compounds is limited. There is a large age dependence to the acute toxicity of pyrethroids in which neonatal rats are at least an order of magnitude more sensitive than adults to two pyrethroids. There is no information on age-dependent toxicity for most pyrethroids. In the present review we examine the scientific data related to potential for age-dependent and developmental neurotoxicity of pyrethroids. "
http://ehp.niehs.nih.gov/members/2004/7254/7254.html

So I guess you could say not only do these environmentalist murder millions of children but they want cause them to be brain damaged.

More:
" 5. Synthetic pyrethroids are neuropoisons acting on the axons in
the peripheral and central nervous systems by interacting with
sodium channels in mammals and/or insects. A single dose
produces toxic signs in mammals, such as tremors,
hyperexcitability, salivation, choreoathetosis, and paralysis.
The signs disappear fairly rapidly, and the animals recover,
generally within a week. At near-lethal dose levels, synthetic
pyrethroids cause transient changes in the nervous system, such
as axonal swelling and/or breaks and myelin degeneration in

sciatic nerves. They are not considered to cause delayed
neurotoxicity of the kind induced by some organophosphorus
compounds. The mechanism of toxicity of synthetic pyrethroids
and their classification into two types are discussed in the
Appendix.

6. Some pyrethroids (e.g., deltamethrin, fenvalerate, cyhalothrin,
lambda-cyhalothrin, flucythrinate, and cypermethrin) may cause
a transient itching and/or burning sensation in exposed human
skin.

7. Synthetic pyrethroids are generally metabolized in mammals
through ester hydrolysis, oxidation, and conjugation, and there
is no tendency to accumulate in tissues. In the environment,
synthetic pyrethroids are fairly rapidly degraded in soil and
in plants. Ester hydrolysis and oxidation at various sites on
the molecule are the major degradation processes. The
pyrethroids are strongly adsorbed on soil and sediments, and
hardly eluted with water. There is little tendency for
bioaccumulation in organisms.

8. Because of low application rates and rapid degradation in the
environment, residues in food are generally low.

9. Synthetic pyrethroids have been shown to be toxic for fish,
aquatic arthropods, and honey-bees in laboratory tests. But, in
practical usage, no serious adverse effects have been noticed
because of the low rates of application and lack of persistence
in the environment. The toxicity of synthetic pyrethroids in
birds and domestic animals is low. "
http://www.fluoridealert.org/pesticides/cyhalothrin.ipcsreview.1999.htm