Reuters: Fashion trends come and go, but “green” is here to stay, say designers and sponsors at New York’s fashion shows this week. Scores of lines boasting biodegradable fabrics, recycled thread or organic materials are sashaying down the catwalks and, if sales of the often more-costly clothing meet expectations, designers and labels will have profitable new revenue streams. But fashion is fickle, and any hot fad risks being pushed to the back of the closet like 1980s’ shoulder …