Originally Posted by Red_Chili
GTL, plus nuclear power generation and plug-in electric personal transportation. And recycled garbage/sewage -> methane, methinks.
Yep, I forgot about waste methane. I read that there is a landfill somewhere around Denver where they are literally drilling for NG. They wrote that there is 20 years worth (I don't recall the CF/yr, but it was significant enough to be viable economically).
I also read somewhere that they have genetically engineered some kind of algae to produce biodiesel.