Warren Buffett’s estimated net worth is something like $62 billion, so it’s hard not to wonder what he’s up to. Big cars are obviously a giant step backwards in our fight to save the environment – so what’s he thinking? He’s investing heavily in wind power and advising Obama on the economy, so he’s certainly not unaware of both the environmental and fiscal crises we’re facing. Is he seeing a bigger picture — a temporary shift to big cars to kick-start the economy, before launching a whole energy strategy? Or … is he not thinking?