Every day, the world throws away more than a billion meals while nearly 800 million people face hunger. This startling contradiction has become one of our most pressing global challenges, with new ...

Turning trash into cash has become a big business in China, where nearly 720,000 tons of municipal waste are produced every day. The heat from incinerating that mountain of waste has increasingly been ...

Add Yahoo as a preferred source to see more of our stories on Google. In an industrial park in Zhangjiagang, a small city on China's east coast, a large humming and hissing machine feeds on piles of ...