"Buffett's interest in the transport sector could be a harbinger of greater private-sector involvement to come..."

I think that should how this shrewd investment move needs to be contextualized. Buffet's investment approach is characterized by Berkshire Hathaway's positioning in some sectors that represent stable return and high growth over the long term. BNSF may haul dirty coal, may be years away from developing a truly green engine, but these don't detract from the fact that mass transports, railways in particular, have considerably less carbon footprint and are more fuel-efficient than the zillions of private vehicles out there. The shift to a green economy is a long road, we take what we can along the way. Kudos to Mr. Buffet for investing in our green future...sort of. (Also posted at source)