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U.S. special climate envoy John Kerry. Photo: Drew Angerer/Getty Images

U.S. special climate envoy John Kerry waded into treacherous waters with comments about how much new tech is needed to fight global warming.

Driving the news: In part of a BBC interview that aired Sunday, Kerry said, "I am told by scientists ... that 50% of the reductions we have to make to get to net-zero, by 2050, or 2045, as soon as we can, 50% of those [emissions] reductions are going to come from technologies that we don’t yet have."

Why it matters: That irked some activists and experts, who see it at odds with what's possible with the aggressive deployment of mature tech.

It's the latest flare-up of climate-world tensions over how much innovation is needed (though Kerry also pushes accelerated steps with existing tools).

Driving the news: Influential activist Greta Thunberg and prominent climate scientist Michael Mann were among several who criticized Kerry's comments.

  • "Great news! I spoke to Harry Potter and he said he will team up with Gandalf, Sherlock Holmes & The Avengers and get started right away!," Thunberg tweeted.
  • Mann lamented "pernicious technophilia" he blames on Bill Gates and spoke with BBC for a subsequent segment (47 minutes in here).

The other side: Jason Bordoff, who heads a Columbia University energy think tank, said people are "way overreacting."

  • If Kerry had simply added that more tech was needed "at commercial scale," the comment would have been spot-on, he argues.
  • "[W]e need innovation, lots of it, to get anywhere close to net zero," Bordoff tweeted.

The big picture: A Kerry aide noted to Axios his remarks are consistent with International Energy Agency findings.

IEA head Fatih Birol said last month: "IEA analysis shows that about half the reductions to get to net zero emissions in 2050 will need to come from technologies that are not yet ready for market."

Go deeper

Pope Francis likely to join UN climate summit in Glasgow: Kerry

Pope Francis holds a Holy Mass for Myanmar Catholic community Living In Rome on May 16, 2021 in Vatican City, Vatican. Photo: Alessandra Benedetti - Corbis/Corbis via Getty Images

Pope Francis, who is a moral leader on climate change, "intends to join" other world leaders at the next round of UN climate talks in Scotland this November, according to John Kerry, the U.S. special presidential envoy for climate change.

Driving the news: Kerry met privately with the Pope on Saturday while on a tour through Europe, and told the press he believes Francis "intends to come."

Teachers across the U.S. protest laws restricting racism lessons

Thousands of teachers and other educators held protests across the U.S. Saturday against the actions of "at least 15 Republican-led states" that aim to restrict teaching about racism in class, the Washington Post reports.

Driving the news: There were demonstrations in at least 22 cities for the "Day of Action" to raise awareness about moves to limit students' exposure to critical race theory, which links racial discrimination to the nation's foundations and legal system, per Axios' Russell Contreras.

Updated 4 hours ago - Health

Lawsuit challenging Houston Methodist's COVID vaccine mandate dismissed

Houston Methodist Hospital in Houston, Texas. Photo: Brandon Bell/Getty Images

A federal judge on Saturday dismissed a lawsuit brought by 117 Houston Methodist staff over the hospital's policy requiring all employees to be vaccinated against COVID-19.

Why it matters: This is the first federal court ruling on a coronavirus vaccine mandate. Attorney Jared Woodfill, representing the plaintiffs, told KHOU 11 it's "the first battle in a long fight," as he vowed to file another lawsuit soon.