I do not think it is about being green. If anything, it is about keeping some kind of connection between the tech used in F1 and what eventually ends up in pro

I do not think it is about being green. If anything, it is about keeping some kind of connection between the tech used in F1 and what eventually ends up in production cars. For example, Honda will be returning to F1 in 2015 to make engines for McLaren. Producing a few V10s for a constructor has no real tie to their core business, but a turbo V6 is very much in line with what their consumers are interested in.