Schroder had been following the peak oil theory -- that production of oil will peak, then decline -- for several years before starting the common-interests Facebook group this January.


Since then, his "Have you heard about peak oil?" collective has ballooned to include members from virtually every continent.

To raise awareness about what peak oil theorists see as the increasingly scare resource's potential to be outpaced by demand, the 25-year-old said Facebook seemed the obvious place to start.