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Illustration: Aïda Amer/Axios

2019 wasn't just the second-hottest year on record — the 2010s will go down as the hottest decade in human memory, per a new report.

Driving the news: The Copernicus Climate Change Service found "an unrelenting upward trend in temperatures as emissions of greenhouse gases trap heat in the atmosphere and change the climate," the N.Y. Times notes.

The big picture: "The amount of carbon dioxide in the atmosphere is now the highest level in human history and probably has not been seen on this planet for 3 million years," WashPost notes.

  • 2019 "also brought troubling signs that natural systems [like permafrost and the Amazon] that serve to store huge quantities of carbon dioxide and methane ... may be faltering as temperatures increase."

By the numbers, per Copernicus:

  • "The five warmest years on record have all occurred in the last 5 years."
  • "Globally, the calendar year 2019 was 0.59°C warmer than the 1981–2010 average."
  • "2016 is the warmest calendar year on record, with a global temperature 0.63°C above that for 1981–2010.
  • "The third warmest calendar year, 2017, had a temperature 0.54°C above average."

What's next: November 2020 is shaping up to be a historic month on climate, Axios' Amy Harder reported.

  • The UN's annual conference will offer the most high-profile moment for the Paris deal since it was signed in 2015.
  • Trump is also likely to formally withdraw from Paris climate accords the day after the election.

Go deeper: Axios' special report on climate change

Go deeper

Exclusive: GOP Leader McCarthy asks to meet with Biden about the border

House Minority Leader Kevin McCarthy at CPAC. Photo: Joe Raedle/Getty Images

House Minority Leader Kevin McCarthy (R-Calif.) has requested a meeting with President Biden to discuss the rising numbers of unaccompanied migrant children at the U.S.-Mexico border, in a letter sent on Friday.

Why it matters: Biden is facing criticism from the right and the left as agency actions and media reports reveal spiking numbers of migrant children overwhelming parts of the U.S. immigration system. Recent data shows an average of 321 kids being referred to migrant shelters each day, as Axios reported.

Vaccine hesitancy drops, but with partisan divide

Illustration: Sarah Grillo/Axios

69% of the public intends to get a COVID vaccine or already has, up significantly from 60% in November, according to a report out Friday from the Pew Research Center.

Yes, but: The issue has become even more partisan, with 56% of Republicans who say they want or have already received a coronavirus vaccine compared to 83% of Democrats.

Ben Geman, author of Generate
3 hours ago - Energy & Environment

China's 5-year plan is hazy on climate

Illustration: Sarah Grillo/Axios

China's highly anticipated 5-year plan revealed on Friday provides little new information about its climate initiatives, leaving plenty to discuss in multinational meetings this year and lots of blanks for China to fill in later.

Driving the news: The top-line targets for 2025, per state media, aim to lower energy intensity by 13.5% and carbon emissions intensity by 18% — that is, measures of energy use and emissions relative to economic output.