Citigroup announced its $50 billion 10-year environmental plan, but the Rainforest Action Network is Unimpressed . . .
Warren Buffett and Charlie Munger disagree when it comes to global warming . . .
Charlie Munger's controversial stance on Ethanol . . .
Attacks from Nigerian rebels in which three oil pipelines were blown up continue to underscore the vulnerability of the world's oil supply . . .