Big Oil will have no problems in the transition. They will simply invest in, or partner with, biofuel companies and the like, and reinvent themselves as the 'clean energy people'.

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1985 380SE Blue/Blue - 230,000 miles
2012 Subaru Forester 5-speed
2005 Toyota Sienna
2004 Chrysler Sebring convertible
1999 Toyota Tacoma