“ What a footprint it is. The 200 or so cars competing in the second annual race — an update of the famed Cannonball Run — will spew about as much CO2 in seven days as the average person generates in 16 years. Mention that to the drivers and they’ll probably ask, “Yeah? And?” They know they’ll take some heat from environmentalists, and they’re unapologetic. “How much more do they want to strangle the human race,” asks race founder Tim “Maverick” Porter. “Why can’t car enthusiasts have a little fun?