Europe’s flight-shame movement has travelers taking trains to save the planet

Air travel, once celebrated as an opening of the world, is now being recognized for its contribution to global problems.

Tourists have been spooked by the realization that one passenger’s share of the exhaust from a single flight can cancel out a year’s worth of Earth-friendly efforts. And so they are digging out their parents’ yellowing Europe-by-rail guidebooks and trading tips on the most convenient night train to Vienna.

By Michael Birnbaum