Green headline of the day

I often ridicule the overblown headlines whose agenda is to impose a green tyranny on us.

However, 20 years ago, Wolfensburg suggested a lot of the "Low IQ" and ADD in the inner city was not only from lead pipes and old paint, but from lead in the atmosphere, mainly due to leaded gasoline.

So now via First Things:

'...In an examination of the possible causes for the recent (and unexpected) drop in crime, the esteemed criminologist James Q. Wilson includes this surprising suggestion:

There may also be a medical reason for the decline in crime. For decades, doctors have known that children with lots of lead in their blood are much more likely to be aggressive, violent and delinquent. In 1974, the Environmental Protection Agency required oil companies to stop putting lead in gasoline. At the same time, lead in paint was banned for any new home (though old buildings still have lead paint, which children can absorb).

The bad news, of course, is that brain damage from cocaine/crack or even fetal alcohol syndrome also cause such problem...
on the other hand, could the decrease also be related to less brain damage from placental aging from cigarettes, thanks to anti smoking laws?