Sir Richard Branson (yes, he has been knighted by the Queen) has offered up a handsome reward for any person or organization that devises a way of removing considerable amounts of CO 2 from the atmosphere, long term. Shown here with Al Gore, Branson will has a cool $25 million waiting for whoever comes up with a way to remove 1 billion tons of carbon gases per year from the atmosphere for 10 years - with half being paid upfront, half at the completion of the 10 years.
Sounds ambitious (but what do I know?), and sounds like a great challenge. At the minimum, it will spark some creative thought on how to devise systems or solutions that have a large positive impact over time - and ideally there'll be a winner. This is a good move - altruism doesn't always provide motivation, but money sure as hell does.