ECO-CLOTHING POISED TO MOVE INTO MAINSTREAMBy Marcelle HopkinsColumbia News ServiceA decade ago, environmentally friendly clothing brought to mind hemp smocks and Birkenstocks. But today, eco-fashion is low-rise, boot-cut jeans; little black dresses; Versace; and Armani. With the help of name-brand designers and celebrities, environmentally friendly fashions are getting noticed and are poised