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Air
pollution is the price we pay to keep cars on the road and the wheels
of industry turning, while soil and water pollution is often the
down side of pest free crops and forests. The challenge is, to remove
the pollution, without removing the expectations of modern living.
One of the most effective herbicides
in use is Atrazine. But because of its danger to birds and fish
and as a possible cause of cancer in humans, regulatory bodies have
considered taking it off the market. But this would cause huge problems
for farmers and forestry industries.
"It's a fantastic herbicide, it's
cheap, it's very efficient but the only problem is, it does persist
in the environment and eventually that means it will leach down
to ground water, and once it's in the ground water it means it's
then mobile and can spread around and contaminate."
So enter the Atrazine muncher. Amanda
Tilbury, at Australia's science organisation, CSIRO, has discovered
a native Australian bacteria that will literally eat the problem
away.
"Well, we have a bacteria that degrades
atrazine, and essentially it eats it, as a nitrogen source, and
atrazine generally has a half life in ground water and soils ranging
from one to eight years and in the presence of this bacteria that's
reduced to just five and a half hours. So it's a dramatic difference."
It's hoped that the Atrazine loving
bacteria can be pumped into contaminated ground to gorge on the
herbicide, leaving a clean environment in their wake.
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