As Barneys' holiday windows go, so goes the nation. In the wake of the department store's 'Have a Green Holiday' campaign, that fancy PowerPoint show of Al Gore's, and, ah yes, centuries of environmental neglect, Fashion Week is getting up to speed on all things green. We'll be keeping our eyes peeled for eco-friendly and sustainable touches when things officially kick off tomorrow at Bryant Park, but the green buzz is already in the air.

Tonight at Gotham Hall, EarthPledge will hold its FutureFashion show of 30 looks crafted from natural materials such as organic cotton and vegetable-tanned leather to highlight sustainable apparel manufacturing. Among the designers marshaled to participate by organizers that include Barneys' fashion merchandising VP Julie Gilhart are Ralph Lauren, Donna Karan, Marc Jacobs, Martin Margiela, and longtime eco-warrior Stella McCartney. And who designed the lovely invitation and graphics for the show? Why, Fabien Baron, of course. Barneys won't be selling the designs, but they will be showcased in the windows of the Madison Avenue store.

Not to be outdone by title sponsor Mercedes-Benz, Lexus is bringing the green marketing scheme it pushed at the Sundance Film Festival to the fashion crowd. Not only is the company's Hybrid Living division a sponsor of tonight's FutureFashion show, it's also backing Tuesday's Rodarte show. According to Fashion Week Daily, Rodarte designers Laura and Kate Mulleavy "will demonstrate that refined design need not be forfeited when employing green manufacturing methods." Plus, those seated in the front row will get a special eco-friendly Rodarte scarf tucked inside a reusable bag made from recycled Lexus billboards.

And it case you missed it over the holidays, go here to watch a Green Holiday-themed video in which Gilhart talks with Barneys creative wizard Simon Doonan, who really deserves his own network talk show.