Leaded petrol linked to violent crimes
Monday January 07, 2013 12:36:58 PM,
IANS
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London: Leaded petrol
led to violent crimes in the 1980s and 1990s, dropping steeply in
the 2000s after declining level of its use, suggest a clutch of
studies.
High lead levels have been tied to birth defects, lower
intelligence and hearing problems. But now researchers are linking
it to high levels of aggression.
Tulane University toxicologist Howard W. Mielke says high levels
of lead exposure in children in the 1960s and 1970s resulted in a
dramatic surge in crime two decades later. But crime rates dropped
off with declining use of leaded gasoline, the Daily Mail
reported.
Each metric tonne of lead released into the atmosphere, Mielke
calculated, resulted in an increase of 1.59 aggravated assaults
per 100,000. The results were millions more shootings, stabbings
and beatings, the professor said.
The data was able to explain 90 percent of the rise and fall of
crime rates in the cities studied. The link between lead and
violence is relative new, as well.
Herbert Needleman, University of Pittsburgh researcher, conducted
a 1996 study that showed that children with high lead levels were
much more likely to exhibit aggressive behaviour than those with
normal levels.
A 2002 study showed that arrested youths had far higher levels of
lead in their bones, on average, than their non-delinquent peers.
Leaded fuel is still in use - but only in race cars,
piston-powered airplanes and some off-road vehicles.
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