It's clear green has gone mainstream. Wal-Mart has been on board for several years.

Customers have responded well.. sales for "green products" have increased dramatically in the last year. Compact fluorescant light bulbs are among the most popular items.

Wal-Mart tracks green sales with its "live better" index. It shows big numbers for C.F.L's. Concentrated liquid laundry detergent and organic baby food are other big winners.

Now Wal-Mart's looking to add even more green products. Wal-Mart is working to reduce plastic bag waste. It hopes to cut the numbers by one third in the next five years.