“Buffett betting on the economic future?” another asks. “I say he expects gasoline to cost about $10 a gallon and trains will be the only transportation we impoverished peons can possibly afford to use. Best regards, keep up the excellent work.”
it might also about the carbon credits in US Clean Energy and Security Act...
"As Burlington Northern transports vastly more freight per emission than road or air hauliers, there is potential for it to trade millions if not billions of dollars of carbon credits in future years. "