I'd argue that staying at home is doing the world a bigger favor, both in terms of air pollution and in terms of "being a vector". For most people it also doesn

I'd argue that staying at home is doing the world a bigger favor, both in terms of air pollution and in terms of "being a vector". For most people it also doesn't make sense to sit around on a flight to save a couple of bucks, their time is usually more valuable than that.