Traditional Textile Dyeing

Everyone wears jeans, but it's not every day we think about what it takes to make that pretty blue color. Walking along the shore of the Pearl River Delta in China, CNN's Emily Chang comes across piles of trash, many of which contain scraps of blue denim.

On the banks of the Pearl River, vendors set up shop daily at the Luwei village market. Mr. Liu wanders through the stalls at dusk, selecting vegetables and fish from the local fishmonger for dinner. As the sun sets on the murky river, he marvels at the disturbing transformation of the waterway he calls home.