While I flew quite a bit during my bachelor / master studies, I haven’t flown since starting my PhD, neither for private nor academic reasons. I guess, as long as we haven’t found a good technological solution for this, everyone who’s serious about his or her own carbon footprint has no other choice than to drastically reduce their own flights.

Increasing the price of flights significantly (carbon tax?) could be an interesting option, while at the same time improving (and subsidizing?) public transportation by trains and buses.