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Photo: Robyn Beck/AFP/Getty Images

The third Democratic primary debate in Houston had little discussion of climate change and energy, but still lent itself to some hot takes.

The big picture: Climate is stitched into the fabric of 2020 now. Beyond the whopping 5 minutes or so of direct discussion, many candidates wove climate into their mini-stump speeches and answers on other topics.

  • Pete Buttigieg hit President Trump for skipping the climate session at the recent G7 meeting as part of a broader foreign policy critique.
  • Joe Biden, in his wide-ranging opening statement, said "I refuse to postpone any longer taking on climate change."

Elizabeth Warren's answer caught my attention. The Massachusetts senator said "we've got to use all the tools" and then went on to say (emphasis added):

  • "One of the tools we need to use are our regulatory tools. I have proposed following [Washington] Governor Inslee, that we, by 2028, cut all carbon emissions from new buildings. By 2030, carbon emissions from cars. And by 2035, all carbon emissions from the manufacture of electricity."
  • But, but, but: All the candidates' plans are a mix of regulations and calls for major new legislation, and achieving those aggressive targets would almost certainly require the latter.

Amy Klobuchar's answer also caught my attention. The Minnesota senator said her background is a plus for confronting the "existential crisis of our time" because ... "I think having someone leading the ticket from the Midwest will allow us to talk about this in a different way and get it done."

On Cory Booker's veganism: The food system is super important to the climate, but come on! They were in Houston, the oil capital of the U.S. Yet there were no questions on fracking — which several candidates want to ban — or on energy more broadly.

  • Why it matters: Energy production and use is by far the biggest carbon emissions source.
  • And the moderators didn't even bother trying to draw out contrasts between the candidates, even though their plans have some real differences.

Go deeper: The takeaways from 2020 Democrats' marathon CNN climate town hall

Go deeper

Bryan Walsh, author of Future
54 mins ago - Health

The end of quarantine

Illustration: Annelise Capossela/Axios

Long quarantines were a necessary tool to slow the COVID-19 pandemic during its first phases, but better and faster tests — plus vaccines — mean they can be scaled back considerably.

Why it matters: Quick tests and regular surveillance methods that identify who is actually infectious can take the place of the two-week or longer isolation periods that have been common for travelers and people who might have been exposed to the virus, speeding the safe reopening of schools and workplaces.

Amazon rollups are the hottest deals

Illustration: Aïda Amer/Axios

A new generation of companies is forming to scoop up Amazon marketplace sellers — and venture capital firms are writing big checks to support the effort.

Why it matters: These e-commerce aggregators are all about data and using it to optimize and turbocharge sales, which means they’re using Amazon’s own playbook.

Trump Justice Department obtained phone records of WashPost reporters

Photo: Bill O'Leary/The Washington Post via Getty Images

Former President Trump's Justice Department in 2017 secretly obtained the phone records of three Washington Post reporters, the newspaper revealed Friday.

Between the lines: The reporters — Ellen Nakashima, Greg Miller and Adam Entous — at the time were looking into Russian interference in the 2016 presidential election.