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S4 is an online newsletter covering trends in sustainability and style that is produced by model and sustainable business consultant Summer Rayne Oakes. The current denim issue has features on the why 2007 is “The Year of the Eco-conscious Blue Jean”, the top 50 eco-conscious denim lines and an interview with Micha
Peled, director of China Blue, a documentary about sweatshop workers in a Chinese jeans factory .