A new experimental Wal-Mart store that aims to be more environmentally friendly is opening in Aurora, Colo.

The store uses used vegetable oil from its deli as well as used motor oil from its Tire and Lube Express for heat, Wal-Mart said.

The store´s foundation also utilized more than 500 tons of crushed and recycled concrete removed from Denver Stapleton Airport.

"Our associates are excited to be able to serve our Denver neighbors and use this unique store to show how our company is working towards a more energy-efficient building," store manager Charlie Harris said.

Wal-Mart previously opened another experimental store in McKinney, Texas, this summer.

Goals for the new store include reducing the amount of energy and natural resources need to operate and maintain it, reducing the amount of raw materials needed to construct the site, and substituting renewable materials when appropriate, Wal-Mart said.