This year, athletic-shoe companies took environmental friendliness to the next level with the introduction of sneakers with biodegradable parts. The New Balance 1224 liner is made of recycled coconut shells, and the new Adidas line adi Grun uses natural fibers like hemp. The kicker: The Brooks Trance 8 running shoe, which contains an innovative nontoxic substance in the sole that will eventually break down, eliminating, the company estimates, nearly 30 million pounds of landfill waste over the next 20 years.
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