oxides, zero-valent metals, semiconductor materials and nanopolymers are intro- duced into … Global Footprint Network, Oakland … Klee RJ, Graedel TE (2004) Elemental cycles: a status report on human or natural dominance. … Collins BJ, Stout MD, Levine KE, Kissling GE, Melnick RL, Fennell TR et al (2010) Exposure to.

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