The disappearance of mosquitoes from villages in north-eastern Tanzania is delighting villagers long-plagued by malaria - but mystifying scientists who worry that this could be a new manifestation of climate change. Jim Drury reports.
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The Dow Chemical Company is the leading producer of polyalkylene glycols (PAGs) used in synthetic fluids and lubricants where petroleum,
Deadline: Dec 11 2013
Reward: $52,000 USD
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