Shay Sethi sorts boxes of old t-shirts and sweaters in his small factory near downtown L.A. His startup, ambercycle, recycles old polyester garments to create new fabric and has caught the attention of socially conscious consumers from around the world. Many regularly send him their worn pants and used jackets.

"This is insanity. We're not even doing any marketing" said the 27-year-old co-founder, who says he receives the unsolicited packages weekly.

The L.A. company might not be a household name, but it has pocketed millions in government grants and venture capital, and made a deal with clothing retail giant H&M to make recycled clothes.

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Angelenos could soon see their trash become a large part of their trash cans.

Los Angeles-based manufacturing company Rehrig says it has engineered a way to integrate at least twice as much ocean-bound plastic into its new products as its competitors.

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Think you have what it takes to change how people get around? Then you should apply to the fourth annual L.A. New Mobility Challenge, a joint initiative of CoMotion, the Los Angeles Cleantech Incubator, the NewCities Foundation, the UK Government/ British Consulate-General in Los Angeles, SparkLabs Group and Urban Movement Labs.

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