Whole Foods Market and pop singer Sheryl Crow have created a special edition of the super-natural grocer's signature reusable shopping bag, A Better Bag, that supports the Natural Resources Defense Council's (NRDC) Simple Steps program, to encourage shoppers to take simple steps to reduce consumption and protect the environment.

"I am a big believer in doing what you can, even if it's something as small as reducing the amount of plastic we each use daily that ends up in landfills, whether it is plastic bags, water bottles or product packaging," said Crow, who is an environmental activist. Each bag represents about four 20-ounce plastic bottles, said Whole Foods.

As part of the initiative, for the first time, Whole Foods will offer two sizes of bags. The bag design features a charcoal sketch of a tree with words written by Crow specifically for the project. It also sports the NRDC's Web site address.

The limited edition bag, made from 80 percent post-consumer recycled plastic bottles, will be available from Oct. 15 through the holiday season.

Whole Foods also said it has made a donation to the NRDC in support of the Simple Steps initiative.