New York Times: For decades, the big oil companies and the farm lobby have been fighting about ethanol, with the farmers pushing to produce more of it and the refiners arguing it was a boondoggle that would do little to solve the country’s energy problems. So why are technicians for BP, the giant oil company, now working at an experimental ethanol plant in this old Louisiana oil town, helping to make it more efficient? The erstwhile enemies, it turns out, are gradually learning to get along, …