The Daily Caller article gets a little distracted with its hissy-fit about luxury, and neglects to state the actual problem, which is that air travel is the most energy- and CO2-intensive travel method per person-mile. Obviously moreso if you're alone on your own private jet, but it's still the worst mode, even when you're sandwiched in on a chock-full commercial flight. It's the dirty secret of these climate conferences. The criticism of the Paris meeting is valid on that basis.