Greta Thunberg, the 16-year-old environmental activist-phenom, has helped lead an anti-air travel movement in her native Sweden.
Thunberg and her allies point out that cutting down on flying is one of the best ways for individuals to reduce their carbon footprint.
Germany's Green Party, which has surged in popularity recently, wants to make domestic flights "obsolete as far as possible" by 2035 through new taxes and investments in high-speed rail.
Many young Europeans are following Thunberg's...
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