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Illustration: Rebecca Zisser/Axios

Carbon emissions from China could peak as soon as 2021, which is nine years before the voluntary deadline in their Paris agreement pledge, a new peer-reviewed study finds.

Why it matters: China is by far the world's largest carbon emitter. The trajectory of its emissions affect whether the world has any chance of meeting the Paris temperature goals — or, more likely, how much they're overshot.

What they did: The paper in Nature Sustainability looks at China's urbanization trends and the emissions increases that come with it.

  • They explore China's massive existing and developing cities and growing wealth through the lens of an environmental "Kuznets curve."
  • It's the idea that per-capita emissions initially rise alongside per-capita GDP, but it's a bell-shaped curve in which higher incomes are eventually correlated with emissions decline.

What they found: China's cities and urban centers defy blanket characterization — they note a "great diversity in CO2 emissions and trends among individual cities." But in the aggregate...

"We project that China’s total emissions from fossil fuel and industrial processes will peak at 13–16GtCO2 at some point 5–10 yr ahead of 2030 on the basis of data from the 50 Chinese cities studied here over the period 2000–2016."

The intrigue: The paper says that policymakers will need to tailor policies to the characteristics of different cities and regions and their stage of development.

  • For cities in economically advanced regions where industrial emissions may have already peaked or are close, that means more attention to lower-carbon lifestyles, efficient buildings, transport and renewables deployment.
  • But for other areas seeing fast industrialization and urbanization, "efforts to constrain emissions should focus more on industrial sectors."
  • In addition, it emphasizes the need to prevent "carbon leakage," whereby energy-intensive industries are just moved out the most developed cities.

Go deeper, via Carbon Brief: China’s emissions ‘could peak 10 years earlier than Paris climate pledge

Go deeper

Using apps to prevent deadly police encounters

Illustration: Sarah Grillo/Axios

Mobile phone apps are evolving in ways that can stop rather than simply document deadly police encounters with people of color — including notifying family and lawyers about potential violations in real time.

Why it matters: As states and cities face pressure to reform excessive force policies, apps that monitor police are becoming more interactive, gathering evidence against rogue officers as well as posting social media videos to shame the agencies.

Dan Primack, author of Pro Rata
11 hours ago - Technology

TikTok gets more time (again)

Illustration: Aïda Amer/Axios

The White House is again giving TikTok's Chinese parent company more to satisfy national security concerns, rather than initiating legal action, a source familiar with the situation tells Axios.

The state of play: China's ByteDance had until Friday to resolve issues raised by the Committee on Foreign Investment in the U.S. (CFIUS), which is chaired by Treasury secretary Steve Mnuchin. This was the company's third deadline, with CFIUS having provided two earlier extensions.

Federal judge orders Trump administration to restore DACA

DACA recipients and their supporters rally outside the U.S. Supreme Court on June 18. Photo: Drew Angerer via Getty

A federal judge on Friday ordered the Trump administration to fully restore the Deferred Action for Childhood Arrivals program, giving undocumented immigrants who arrived in the U.S. as children a chance to petition for protection from deportation.

Why it matters: DACA was implemented under former President Obama, but President Trump has sought to undo the program since taking office. Friday’s ruling will require Department of Homeland Security officers to begin accepting applications starting Monday and guarantee that work permits are valid for two years.