Thirsty Concrete or Porous Concrete is helping Yellowstone sustain its delicate ecosystem.

A brilliant new creation is helping one of the best-preserved places in the world. Yellowstone National Park has begun to use porous, or thirsty, concrete in walkways throughout their park. The new concrete, called Flexi-Pave, is made with stones and recycled tires, and Michelin has been helping them install it all over the park.

The porous concrete used at Yellowstone National Park can absorb about 50 gallons of water a minute.

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