This is spot-on, and I think he is right. Fossil Fuel resources are a limited resource, and we've pretty much burned up all the easy pickings. So, aside from

This is spot-on, and I think he is right. Fossil Fuel resources are a limited resource, and we've pretty much burned up all the easy pickings. So, aside from the obvious carbon problems, we've effectively squandered most of this resource on transport and burning for heating. These resources should be conserved for exactly these uses — like flying — where a very high mass-energy density is essential. We need to stop burning it for anything stationary, and most things that roll or float. Direct electric at lower power densities are at this point in history fairly straightforward to swap in (acknowledging that this still is a lot of work), requiring few true breakthroughs. When fossil fuel use is just down to the few true high mass-energy density applications, CO2 generation won't be a problem. So, overall this "what's your carbon footprint" thing is just successful deflection by the oil companies to shift blame from the producing side (who CAN do something about it) to the consuming side, who can only choose among available alternatives.