The NYT has an article in its science section that eschews global warming horror stories and mentions that Richard Branson’s $25 million prize to defeat global warming may hold more promise than trying to cut the world’s greenhouse emissions.
While this is an interesting idea, it raises the question: if we can control carbon dioxide levels in the atmosphere, where should it be set? Do we choose the pre-industrial levels of the middle ages or, since human beings may have had even earlier level?
