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Climate activist Greta Thunberg arrives in New York on a sailboat. Photo: Spencer Platt/Getty Images

Sweden appears to be the only country in the world, or at least in Europe, where fewer people are flying for environmental reasons, the Telegraph reports.

Why it matters: Flying is a massive contributor to carbon footprints in developed countries, but based on the total number of travelers, air travel has increased this year in 38 of 42 European countries, the Telegraph notes. Drops in air travel in Iceland, Turkey and Bulgaria can be explained by economic or demographic causes, but the same can't be said for Sweden — home of climate activist Greta Thunberg and the "flygskam" (flight shame) movement.

  • Zoom in: The number of air travelers in Sweden dropped by 4.1% in the first half of this year. The trend "first manifested itself at the beginning of 2018 but really kicked into gear at the end of last year," per the Telegraph.
  • Zoom out: Air travel across Europe increased by 4.3% in the first half of this year. The smallest increases came in Sweden's Scandinavian neighbors — Denmark and Norway. The biggest jumps were in Ukraine and Austria.

Go deeper: Greta Thunberg tells Congress to "listen to the scientists" on global warming

Go deeper

Omicron cases confirmed in 4 U.S. states

A healthcare worker inserts a Covid-19 rapid test into a machine in Denver, Colorado. Photo: Daniel Brenner/Bloomberg via Getty Images

Five cases of the newly-discovered Omicron variant were detected in New York, Gov. Kathy Hochul (D) and New York City Mayor Bill de Blasio announced on Thursday, making New York the fourth state with confirmed cases.

The latest: In addition to New York, the variant has been confirmed in California, Colorado and Minnesota.

Early winter heat shatters records in U.S., Canada

Temperature departures from average on Dec. 2, 2021, as depicted by the GFS computer model. (Weatherbell.com)

A widespread and intense heatwave is roasting large portions of the U.S. and Canada, shattering daily and monthly temperature records.

Why it matters: Winter is the fastest-warming season across the U.S., and the lingering warmth is shortening the snow season in places like Colorado and Montana, where mountain snowpack is a critical source of water during the summer months.

5 hours ago - Science

COVID time warp

Illustration: Sarah Grillo/Axios

The start of the COVID-19 pandemic seems like a lifetime ago to some, and just yesterday to others. Scientists are beginning to unpack the way people processed the passage of time amidst the stress, uncertainty and isolation of the 1 year, 8 months and 21 days since WHO declared a pandemic.

Why it matters: The pandemic's global effects on how people experience time could provide new insights into the brain's ability to perceive and predict time — a fundamental feature of life.