I’ve just returned from Brazil, where I was attending Sao Paulo fashion Week and giving a talk about sustainability, which was the theme of this year’s premier South American fashion extravaganza. It’s not exactly news that sustainability has begun to infuse glamour industries, after the release of “green issues” for nearly every glossy magazine last year, but seeing the way environmental and social responsibility were embraced in putting on this event nevertheless brought me a surprising sense of encouragement about the whole global shift towards sustainable practices.