The limo, tuxes, gowns, and sparkling decorations spell glitz and glamour for many high school students. Some teens, though, are turning prom into something more than a night of conspicuous consumption. From paperless e-vites to proceeds donated to charity in lieu of overdone disposable décor, these rites of passage are becoming more socially conscious. The website Teens Turning Green , is hosting a Project Green Prom that supplies valuable tips for greening festivities, and features students winning eco-friendly gifts from eco-fashion sponsors like Bahar Shahpar and Lara