"Fossil fuels cannot be effectively replaced, neither cost-effectively nor in the gross amount of available energy. And once the fossil fuels are gone, they are gone forever, meaning that industrial civilization as we know it will collapse--or more to be hoped, industrial society will experience a slow decline"

http://www.amazon.com/Ecotechnic-Future-Envisioning-Post-Peak-World/dp/0865716390/
http://vimeo.com/15857533
http://www.youtube.com/watch?v=TDVGr5HhWA4