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Reproduced from The Conversation; Note: IEA estimates used to compare calculations; Chart: Axios Visuals

Leaky power grids that waste energy before it reaches consumers are an often overlooked source of carbon emissions, per The Conversation.

What they did: Researchers calculated the pollution from additional energy needed to make up for what's lost in transmission and distribution systems worldwide.

  • The experts with Johns Hopkins and the University of Maryland tallied "compensatory emissions" based on generation sources and grid quality in different countries.

What they found: It's big when you add it all up.

  • The losses also vary a lot by country, notes the piece derived from a recent paper in the journal Nature Climate Change.
  • "In 2016, aggregate transmission and distribution losses reached 19% in India and 16% in Brazil," they note.
  • They were over 50% in Haiti, Iraq, and the Republic of Congo, which "means that only half of the electricity generated reached or was billed to the consumers as usable power."

What's next: They call for greater attention to stemming emissions through use of better tech and infrastructure upgrades.

  • Various ways to lower energy loss include replacing inefficient transmission wires, using superconductors to reduce resistance in transmission wires, and configuring distribution lines in a better way.

Go deeper: The carbon footprints of the rich and activist

Go deeper

Biden releases 2019 tax returns ahead of debate

Photo: Alex Wong/Getty Images

Joe Biden's campaign released his 2019 tax returns on Tuesday, showing that he and his wife, Jill, paid nearly $300,000 in federal taxes last year.

Why it matters: The release, timed just hours before the first presidential debate, comes days after a bombshell New York Times report said that President Trump paid only $750 in federal taxes in 2016 and 2017. Biden's team is hoping to make the tax contrast a sticking point during their showdown.

Updated 2 hours ago - Politics & Policy

Coronavirus dashboard

Illustration: Sarah Grillo/Axios

  1. Global: Total confirmed cases as of 2:15 p.m. ET: 33,454,037 — Total deaths: 1,003,571 — Total recoveries: 23,204,219Map.
  2. U.S.: Total confirmed cases as of 2:15 p.m. ET: 7,165,067 — Total deaths: 205,476 — Total recoveries: 2,794,608 — Total tests: 102,342,416Map.
  3. Health: Americans won't take Trump's word on the vaccine, Axios-Ipsos poll finds.
  4. States: NYC's coronavirus positivity rate spikes to highest since June.
  5. Sports: Tennessee Titans close facility amid NFL's first coronavirus outbreak.
  6. World: U.K. beats previous record for new coronavirus cases.

NYC's coronavirus positivity rate spikes to highest since June

New York Mayor Bill de Blasio. Photo: Noam Galai/Getty Images

New York City's coronavirus positivity rate has ticked up to 3.25%, its highest since June, Mayor Bill de Blasio said at a news conference on Tuesday.

Why it matters: The jump — from 1.93% on Monday — came on the first day that public elementary classrooms reopened in the city after months of closures, but guidelines state that all public schools will have to shut if the citywide seven-day positivity rate stays above 3%.

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