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Metal water bottles may leach BPA The estrogen-mimicking pollutant traces to a polymer resin lining affected bottles Web edition : Monday, July 11th, 2011 Consumers who switched from polycarbonate-plastic water bottles to metal ones in hopes of avoiding the risk that bisphenol A will leach into their beverages aren't necessarily any better off, a new study finds.

New advance in hydrogen engergy. Relevant because cars in the future might use hydrogen engines