Nowadays, with consumers that are not just fashion conscious, but also environmentally conscientious, more and more large chain retailers are jumping on the eco-wagon and offering sustainable styles. Here's a look at some of the biggest names in apparel and the eco friendly collections they offer.

Coca Cola's Drink 2 Wear apparel, made from a blend of recycled plastic bottles and cotton, was recently added to Wal-Mart stores across the nation. The men's and women's T-shirts feature messages intended to educate consumers about the value of recycling. Once collected from curbside drop-off locations, the post-consumer PET bottles are run through grinders that reduce them to flake form. These are then cleaned and sold to manufacturers who convert them to fiber, which is eventually transformed into yarn. Coca-Cola's rPET line also includes tote bags, messenger bags, caps, purses, and notebooks made from recycled plastic bottles.

American Apparel's sustainable clothing line uses organic cotton -- grown without herbicides or insecticides. With eco friendly apparel now available in 21 different styles, the fabric used omits toxic elements of the dye process, such as catatonics, silicone softeners, or optical brighteners. The company curbs its carbon dioxide emissions by ensuring that the knitting, dyeing, manufacturing and shipping all take place within Los Angeles in a downtown factory that uses a solar panel installation to generate renewable energy.

Due to launch in May, Target's first eco-friendly designer collection is designed by Rogan Gregory, the co-founder of organic cotton designer jeans agency Loomstate. Ranging in price from $14.99 – $44.99, the line includes a variety of eco-friendly wardrobe staples including loose tanks, wrap dresses and hoodies created from organic cotton, linen, bamboo and hemp.

In an attempt to reach out to the environmentally conscientious, in 2006, Levi Strauss & Co. unveiled its first pair of sustainable 100 percent organic cotton jeans in North America. Later that year, the company went one step further for its European consumers, creating a pair of eco jeans that has no metal rivets, and uses a coconut shell button on the waistband. The finishing process involves only chemical-free compounds like natural indigo and mimosa flower. In order to cut down on long distance transport and the associated fuel costs, the jeans are made in Hungary; the cotton comes from Turkey (the nearest available source) and other materials and components are sourced from Europe.

In order to combine optimum athletic performance with environmental considerations, Nike unveiled its Considered line in 2005. The goal -- to reduce waste and toxins, use more environmentally friendly materials, and create sustainable products through innovation. Part of this line, Nike's first eco friendly basketball shoe, the AIR JORDAN XX3, uses a new 3-D stitching machine that circumvents the necessity of using solvent cements. The shoe's outsole uses environmentally preferred rubber that reduces toxins and incorporates recycled material from worn-out athletic shoes of any brand.

Aiming to offer chic yet affordable apparel for the environmentally conscious, H&M incorporates organic cotton in select pieces of its clothing line. The Swedish chain has significantly ramped up its use of the material, using 1,500 tons of organic cotton for its spring line alone -- more than the total amount it utilized last year. The designs are available in almost every department, and include dresses, blazers, blouses, tops, trousers, socks, underwear, and sleepwear.

To kick off Season 2 of The Green on Sundance Channel, Barneys New York partnered with the network and sustainable fashion brand Loomstate to create a national T-shirt recycling program. Consumers are incentivized with discounts on Loomstate purchases to drop off old T-shirts at Barneys locations nationwide. Loomstate will re-fashion the T-shirts to create a new, limited edition T-shirt collection to be sold exclusively at Barneys.