Green wave in american retail

At Home Depot Inc.'s headquarters in Atlanta, associates' empty soda bottles are collected and filled with a worm-excrement mixture and sold as plant food.

Wal-Mart is rating its 60,000 suppliers on how well they
conserve natural resources, and it recently announced a goal of selling
sustainable electronics. 
The environment is a growing concern for retailers across
the US as they feel pressure to cut energy use, curb carbon emissions and slash
waste, while in the process encouraging suppliers to develop eco-friendly
products and practices and helping, or in some cases persuading, consumers to
shop — and live — green. Initiatives range from reducing packaging and
halting nonessential mailings to adopting more efficient store design and
nontoxic building materials.