Though air travel is more popular than ever, the vast majority of people in the world have never been on a plane. As that dynamic slowly changes, the environment stands to suffer. Is flying less the only solution? https://www.dw.com/en/to-fly-or-not-to-fly-the-environmental-cost-of-air-travel/a-42090155 As little as 3 percent of the global population flew in 2017, and at most, only…