Fossil fuels such as oil come from, well, fossils—organisms that died long ago. This means there is a limited supply, and at some point we'll be tapped out. Scientific American editor David Biello explains when the well may run dry.
Deadline: Jun 29 2013
Reward: $7,000 USD
The Seeker for this Challenge desires proposals for chemical methods that could rapidly degrade a dilute aqueous solution
Deadline: Jun 30 2013
Reward: $1,000,000 USD
This is a Reduction-to-Practice Challenge that requires written documentation and&
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