Erf
. This is a hard choice to make. I don't really know between thread on specific locations (Canada or LA for exemple) or on technical approaches (Alternatives fuels for exemple). Erf and Erf again.
So for the current time being, lets go for the following thread which has been very usefull lately.
post-apocalyptic picture thread by General Pain.
(edit by kato: I will clickify any links if necessary)