Next to a busy train station in Buenos Aires, not far from the chic restaurants and condos getting all the attention these days, lies another world. Behind a gate is a long metal shed, once used to store trains. This is La Casa del Afectado Social y Ambiental -- literally, "the house of the enviro-socially affected." Here, amidst the bustle of traffic and commuters, hundreds of people on the flip side of the nation's renewed glitter are taking a stand. Press the next arrow to see more images of life at Casa del Afectado. Photos: Morgan Stetler It may have …