One inspiration for this project is the work of climate scientist James Hansen, who has highlighted the importance of phasing out coal and avoiding unconventional fossil fuels, if dangerous climate change is to be avoided.

His thinking on the matter is summarized in this PDF presentation, hosted on his website:

October 2009: Global Warming Time Bomb: Actions Needed to Avert Disaster. Slides and notes for presentation given Oct. 26 at the Club of Rome Global Assembly in Amsterdam, the Netherlands.