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Eco-photos of the week: July 31-Aug. 6

Aug. 5, 2011, 7:28 a.m.
Children investigate an exhibit of plasma balls at the Tianjin Electric Power Museum in Tianjin, north China on Aug. 3.

Photo: ZUMA Press

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Plasma balls

Children investigate an exhibit of plasma balls at the Tianjin Electric Power Museum in Tianjin, north China on Aug. 3 as part of a summer camp aimed at spreading the knowledge of electricity to adolescents with lectures and science instruments.