Grapevine

An Inconvenient Truth, a documentary about global warming starring Al Gore, opens in theaters in May. * Jewelry retailers Zales, Tiffany, and Cartier have joined a campaign to clean up gold mining, pledging to get more of the precious metal from environmentally responsible sources. Visit nodirtygold.org. * Whole Foods Market has purchased enough wind-energy credits to offset the power used by its 180-store operation. * The NFL planted some 2,500 trees near Ford Field in Detroit to help make up for emissions created by powering lights, heating, and equipment during February's Super Bowl. * Elle magazine's May issue is printed on recycled paper and features articles on green topics--including one by actress Cameron Diaz.