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All stripes of renewable energy increased between 2016 and last year, according to the U.S. Energy Information Administration.

Expand chart
Here is a handy card deck of what you need to know about America's different electricity sources. This is updated from our initial power mix rundown in July.

Why it matters: The recently updated EIA data, which is the federal government’s official breakdown of U.S. electricity, shows an increasingly diverse mix. That goes counter to warnings by Energy Secretary Rick Perry and other government officials that the grid is too reliant on one type of fuel.

By the numbers:
  • Solar went from 0.9% in EIA’s 2016 breakdown to 1.9% in 2017, with 0.6% of that being rooftop solar.
  • Wind’s share went from 5.6% to 6.3%.
  • Hydropower, a renewable energy that doesn’t get as much attention as wind or solar, ticked up from 6.5% to 7.5%.

To be sure: Regional mix of electricity can vary greatly, and even certain days can have more renewable energy or less. The importance of the EIA’s breakdown is that it captures the yearly average across the U.S., which shows changes over longer periods of time. For example, in 2008, EIA’s breakdown of electricity mix was much more heavily coal (48.2%) compared to today (30.1%.)

What’s next: My next Harder Line column — out Monday — will break down some complicated electricity terms. This is my next glossary installment, building off my inaugural glossary earlier this year on more general energy and climate terms. Stay tuned!

Go deeper

Biden pledges to cut greenhouse gas emissions by up to 52% by 2030

U.S. President Joe Biden seen in the Oval Office on April 15. (Photo by Doug Mills-Pool/Getty Images)

The Biden administration is moving to address global warming by setting a new, economy-wide greenhouse gas emissions reduction target of 50% to 52% below 2005 levels by 2030.

Why it matters: The new, non-binding target, is about twice as ambitious as the previous U.S. target of a 26 to 28% cut by 2025, which was set during the Obama administration. White House officials described the goal as ambitious but achievable during a call with reporters Tuesday night.

Exclusive: Chauvin trial prosecution worked with strategic communications firm

People gather at the intersection of 38th Street and Chicago Avenue to celebrate the guilty verdict in the Derek Chauvin trial on April 20, 2021 in Minneapolis, Minnesota. Photo: Brandon Bell/Getty Images

For most of the past year, a strategic communications firm with deep Washington ties has played an integral role for the prosecution in the State of Minnesota v. Derek Chauvin — operating without pay and so under-the-radar that most of its own staff had no idea.

The big picture: Finsbury Glover Hering — formerly known as the Glover Park Group — has been conducting media monitoring and analysis as part of legal team special prosecutor Neal Katyal's vision for a three-pronged "modern appeal/trial strategy."

World leaders brace for historic Trump Facebook ban decision

Illustration: Aïda Amer/Axios

The upcoming decision from Facebook’s independent Oversight Board on whether to uphold or reverse Facebook’s indefinite suspension of former President Trump’s profiles has policymakers on edge.

Why it matters: The decision will set a historic precedent for how the tech giant treats accounts of world leaders, and could be a litmus test for the board’s power.