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Photo: Xavier TESTELIN/Gamma-Rapho via Getty Images

Green rooftops are growing in popularity, offering a slew of environmental benefits, the New York Times reports.

The big picture: The rooftops on apartments or commercial buildings often feature lawn areas, grills and seating. Some host community gardens, blossoming vegetables and herbs. But the greenery, and corresponding absence of asphalt and shingles, doesn't just up the aesthetic, it lowers surrounding temperatures, reduces energy use and assists in filtering storm water.

  • Green Roofs for Healthy Cities estimates the rooftops in North America have increased roughly 15% since 2013.
  • The National Research Council of Canada estimated the rooftops can lower a building's air conditioning use up to 75%.
  • Plants on rooftops are able to absorb rain water before it hits the ground, acting as filters and reducing runoff.
  • And, through evapotranspiration, plants cool the surrounding air by evaporating moisture, allowing temperatures to cool.

Between the lines: In many cities, the rooftops are no longer optional.

  • Both New York City and San Francisco have passed requirements for newly constructed buildings to have some component of green roofs, solar panels or both.
  • In 2010, Copenhagen made green roofs a requirement for all new commercial buildings, with a caveat for those with over a 30-degree slope.
  • In 2016, Córdoba, Argentina, passed legislation requiring all rooftops over 1,300 square feet, regardless of age, to turn green.

Go deeper: How I am trying to get greener and cheaper electricity

Go deeper

Off the Rails

Episode 7: Trump turns on Pence

Photo illustration: Eniola Odetunde/Axios. Photos: Elijah Nouvelage, Alex Wong/Getty Images

Beginning on election night 2020 and continuing through his final days in office, Donald Trump unraveled and dragged America with him, to the point that his followers sacked the U.S. Capitol with two weeks left in his term. Axios takes you inside the collapse of a president with a special series.

Episode 7: Trump turns on Pence. Trump believes the vice president can solve all his problems by simply refusing to certify the Electoral College results. It's a simple test of loyalty: Trump or the U.S. Constitution.

"The end is coming, Donald."

The male voice in the TV ad boomed through the White House residence during "Fox & Friends" commercial breaks. Over and over and over. "The end is coming, Donald. ... On Jan. 6, Mike Pence will put the nail in your political coffin."

Big Tech's post-riot reckoning

Photo illustration: Sarah Grillo/Axios. Photo: Tasos Katopodis/Getty Images

The Capitol insurrection means the anti-tech talk in Washington is more likely to lead to action, since it's ever clearer that the attack was planned, at least in part, on social media.

Why it matters: The big platforms may have hoped they'd move to D.C.'s back burner, with the Hill focused on the Biden agenda and the pandemic out of control. But now, there'll be no escaping harsh scrutiny.

30 mins ago - Technology

Why domestic terrorists are so hard to police online

Illustration: Eniola Odetunde/Axios

Domestic terrorism has proven to be more difficult for Big Tech companies to police online than foreign terrorism.

The big picture: That's largely because the politics are harder. There's more unity around the need to go after foreign extremists than domestic ones — and less danger of overreaching and provoking a backlash.