149 Kg of Carbon Dioxide

[mrbigstuff]

I think it's a good metric to have, although I would not be inclined to forgo a connecting flight because of this information. My problem is the non-competitive nature of the information: if you elect to not take the flight, someone else probably will. It's a demand-induced industry. If we all become more aware of the flight costs, the airlines, in theory at least, would offer fewer flights.