And your figure for road transport includes the cost of manufacturing and disposing of cars, does it? And the extra energy costs of domestic heating, land misuse with private concrete hard standing, and extra milage for goods delivery because the car results in scattering dwellings across the countryside? (The absolute pits for this are post-automobile shitholes like rural America and New Zealand, where everything in the human landscape is dictated by car accessibility and land is wasted like whales in the heyday of the factory ship).

A 60mpg car probably has a worse carbon footprint than a 1960 Cadillac. Cars use more energy in their manufacture and disposal than they do in fuel, and a modern car uses far more energy-intensive-to-make, hard-or-impossible-to-recycle construction materials than an old banger made of steel and rubber. The most fucked-up proposal ever for a green technology is the electric car - what do you think batteries are made of?