You do have some measure of control as a conscientious traveller (apart from voting, obviously). Not (or rarely) flying is one part of the equation; using your

You do have some measure of control as a conscientious traveller (apart from voting, obviously). Not (or rarely) flying is one part of the equation; using your money to support more sustainable travel alternatives is the other. In Europe a slow but gradual resurgence of sleeper trains is happening in part because a sizeable group of people is willing to use them (me included). I would argue that doing this (i.e., increasing market demand for more sustainable modes of travel) helps pave the way for more structural solutions that require a lot of political will-power (such as taxing air travel much more heavily), where the availability of alternatives forms part of the decision making process.