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Science Quickly

Stiffer Roads Could Drive Down Carbon Emissions

Science Quickly

Scientific American

Science

4.2639 Ratings

🗓️ 19 June 2020

⏱️ 3 minutes

🧾️ Download transcript

Summary

By hardening the nation’s streets and highways, trucks would use less fuel and spare the planet carbon emissions. Christopher Intagliata reports. Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

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0:00.0

Understanding the human body is a team effort. That's where the Yachtel group comes in.

0:05.8

Researchers at Yachtolt have been delving into the secrets of probiotics for 90 years.

0:11.0

Yacold also partners with nature portfolio to advance gut microbiome science through the global grants for gut health, an investigator-led research program.

0:19.6

To learn more about Yachtolt, visit yawcp.co.j.jot.com.j, that's y-A-K-U-L-T-C-O-J-P.

0:28.4

When it comes to a guide for your gut, count on Yacol.

0:33.7

This is Scientific American's 60-second science. I'm Christopher in Taliatta.

0:39.3

When you walk on a sandy beach, it takes more energy than striding down a sidewalk, because

0:43.9

the weight of your body pushes into the sand.

0:46.3

Turns out, same thing is true for vehicles driving on roads.

0:49.7

The weight of the vehicles creates a very shallow indentation or deflection in the pavement. And it makes

0:58.9

it such that it's continuously driving up a very shallow hill. Jeremy Gregory, a sustainability scientist

1:05.5

at MIT, his team modeled how much energy could be saved and greenhouse gases avoided by simply

1:12.0

hardening the nation's roads and highways. And they found that stiffening 10% of the nation's roads

1:17.3

every year could prevent 440 megatons of carbon dioxide equivalent emissions over the next five

1:23.8

decades. That's enough to offset half a percent of projected transportation sector

1:28.6

emissions over that same time period. To put those emissions savings into context, that amount is

1:34.3

equivalent to how much CO2 you'd spare the planet by keeping a billion barrels of oil in the ground,

1:39.9

or by growing seven billion trees for a decade. The results are in the transportation research record.

1:46.8

As for how to stiffen those roads, Gregory says you could mix small amounts of synthetic fibers

1:52.0

or carbon nanotubes into paving materials, or you could pave with cement-based concrete,

1:57.3

which is stiffer than asphalt. And it's worth noting here that the research was funded

2:01.2

in part by the Portland Cement Association. This system could also be a way to shave carbon

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