In my opinion, the easiest way to get the world to let it happen is if the oil wells are set alight, as they were during the 1st Iraq war in 1991. The whole world was aghast at the evironmental damage and waste of resources that the event produced, and troubled over how long it took to get under control.

If any wells appear to be actually blown up,...expect the Marines (in the interest of environmental and economic emergency) to invade forthwith.

And for that reason, I suspect somewhere there is a U.S. general holding a draft plan for some U.S. black ops team to infiltrate into Libya and detonate just enough wells to generate just enough world panic.