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2. http://go.nature.com/h2sjoe
3. Miller, G. et al. Nanomaterials, Sunscreens and Cosmetics: Small Ingredients, Big Risks (Friends of the Earth, 2006).
4. Miller, G. et al. Out of the Laboratory and on to Our Plates: Nanotechnology in Food and Agriculture (Friends of the Earth, 2008).
5. www.oecd.org/env/nanosafety