It would be great if they factored in the weight of the vehicle and the size (area) of the tire. High psi loads inroads do proportionally more damage
The altitude exemption is not generally true in California. I'm in a county with some extremely rural areas that get no exception on the no burn orders based on altitude.
Woodsmoke is incredibly polluting, both indoors and outside even from a great fireplace like the Blaze princess (my first choice until my insurer vetoed it).
Wood Burning and the Environment By 2012, the few percent of Californians burning wood were polluting more than the pollution from all the vehicles combined. Today it is closer to three times, despite decreases in the number of homes with wood fired anything, and more vehicles on the road.
Did you know that wood (or charcoal) used for cooking is exempt from the California Air Resources Board restrictions? (Despite the pollution levels!)
All the best,
BG