• picture
  • picture
  • picture
  • picture
Public Radio's Environmental News Magazine (follow us on Google News)

Cool Fix for a Hot Planet

Air Date: Week of

Workers underlay pavement with a network of pipes that will carry water, warmed by the sun, to heat houses in the winter. (Courtesy of Ooms Avenhorn Group)

Dutch scientists have figured out how to harness the sun as it beats down on hot highways - cutting heating and road repair bills. Annie Jia reports.


GELLERMAN: It’s Living on Earth. I’m Bruce Gellerman. Just ahead: pedaling to the pits – biking to the lowest places on earth. But first, this Cool Fix for a Hot Planet from Annie Jia.


JIA: On a hot summer day when the sun’s beating down, some people say, it’s hot enough to fry an egg on the sidewalk.

But a company of civil engineers in Holland has come up with a new, and more practical, way to use the roadway to harness the sun’s heat.

Pavement is laid over the pipes. The warmth retained by the water prevents the surface from freezing in winter, lessening wear and tear on the road.


At nearly a dozen sites across the Netherlands, embedded in the pavement, lies a network of pipes. Water flows through these pipes and heats up in the summer sun. The warm water is then stored underground, where it stays hot for several months.

In the winter, the water is circulated through nearby buildings – homes, industrial complexes, even an airplane hangar – providing warmth.

After it chills, the water is pumped back underground, where it stays cold into the summer. On hot days, the now-chilly liquid provides the same buildings with energy-efficient air conditioning.

Workers underlay pavement with a network of pipes that will carry water, warmed by the sun, to heat houses in the winter. (Courtesy of Ooms Avenhorn Group)

At one site, in the northern village of Avenhorn, a 200-yard stretch of road and a nearby parking lot supply a four-story, seventy-unit apartment building with half of its annual heat.

But it’s not just the buildings’ residents who benefit. In fact, this new energy system sprang out of efforts to cut road repair costs. The warm water flowing beneath the road’s surface keeps it from icing over, and so, protects it from the damaging cycles of freezing and thawing.

While the technology remains more costly than conventional heating, its developers believe rising fossil fuel prices will soon render it economical.

That’s this week’s cool – or, hot – fix, for a hot planet. I’m Annie Jia.



Living on Earth wants to hear from you!

Living on Earth
62 Calef Highway, Suite 212
Lee, NH 03861
Telephone: 617-287-4121
E-mail: comments@loe.org

Newsletter [Click here]

Donate to Living on Earth!
Living on Earth is an independent media program and relies entirely on contributions from listeners and institutions supporting public service. Please donate now to preserve an independent environmental voice.

Living on Earth offers a weekly delivery of the show's rundown to your mailbox. Sign up for our newsletter today!

Sailors For The Sea: Be the change you want to sea.

Creating positive outcomes for future generations.

Innovating to make the world a better, more sustainable place to live. Listen to the race to 9 billion

The Grantham Foundation for the Protection of the Environment: Committed to protecting and improving the health of the global environment.

Contribute to Living on Earth and receive, as our gift to you, an archival print of one of Mark Seth Lender's extraordinary wildlife photographs. Follow the link to see Mark's current collection of photographs.

Buy a signed copy of Mark Seth Lender's book Smeagull the Seagull & support Living on Earth