Europe wants you to travel by train. But why is it so complex and expensive?

Across the continent, flights are priced at a fraction of the cost of train tickets, hampering the growing number of people who want to travel sustainably. The big question is: why?

"We wanted to go to Brittany," she said, "and we wanted to travel by train because I felt it was more sustainable. I bought Eurostar tickets easily and was willing to pay extra in comparison to flying. I booked an Airbnb and planned to buy the Paris-to-Brittany train ticket closer to the time. I felt good about the trip."