The best way to get people to make the kinds of decisions you are talking about, is through their pocket book. You can't guilt most people into not doing someth

The best way to get people to make the kinds of decisions you are talking about, is through their pocket book. You can't guilt most people into not doing something important to their lives, like visiting a famous city or staying cool enough to be able to go to work the next day, even if it is something you personally consider frivolous. This is the entire reason why markets exist. More to the point, if there was a carbon free air travel then you would have no moral case against visiting Paris (or wherever). The marginal cost in terms of the environment of one person, more or less, staying home is pretty darn close to zero. The only real way to convince a few million people to stay home or travel closer to home, is through a carbon tax or something similar. But you seem to have conveniently left that out of your argument here.