Also from TG:
Don't scoff. Racing drivers, teams and, crucially, rule makers, are really starting to wake up to the environmental impact their sport might be having.
Carbon offset programs are cropping up everywhere - this year's Rally Norway was carbon neutral and the FIA has been planting trees in Mexico for the last 12 years to try and reduce F1's considerable environmental impact.
Even historic cars are doing their bit, because the Orwell Super Sports Cup racing cars are carbon neutral. And these things are 8.0-litre McLaren and Lola Can-Am cars, possibly some of the hairiest things ever built.
Of course, certain aspects would still make an environmentalist choke on his muesli. Just think of how much cargo the F1 circus airfreights around the world each year, or how many private jets are used to ferry drivers and senior personnel to tests or promotional 'do's.
Still, the point is that major figures in motorsport are starting to wake up to this problem. Just look at the Honda Earth Car as an example.
But this green obsession is about more than simply off-setting the environmental impact, which is yet to be proved as the ultimate answer to the problem. No, what motorsport can really do is make all the green technologies work on a day-to-day basis. Part of the reason car manufacturers go racing is to improve the tech on their road cars, and the same applies to their environmental thinking.
To that end, Lexus entered a GS450h in the Tokachi 24-hour Race last year, you've got high performance diesels racing at Le Mans such as the Peugeot 908 and Audi R10, IndyCars running on ethanol and regenerative braking being touted in Formula One (granted, a few years after McLaren got it pretty much right but saw it banned on safety grounds).
The braking system is similar to what Toyota and Honda use in their hybrids. To give you an idea on how effective the system could be, the FIA has calculated that about 2,500 horsepower is lost in energy terms when an F1 car brakes from 200mph.
Just imagine that in a Prius.