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Food waste also an issue in China




 A box of food scraps that will be composted sits at the Norcal Waste Systems transfer station April 21, 2009 in San Francisco, California. Norcal Waste Systems is collecting food scraps from nearly 2,000 restaurants in San Francisco and thousands of single-family homes and are turning the scraps to make high quality, nutrient rich compost that gets sold back to Bay Area farmers. The garbage company has turned 105,000 tons of fodd scraps into 20,000 tons of compost.
A box of food scraps that will be composted sits at the Norcal Waste Systems transfer station April 21, 2009 in San Francisco, California. Norcal Waste Systems is collecting food scraps from nearly 2,000 restaurants in San Francisco and thousands of single-family homes and are turning the scraps to make high quality, nutrient rich compost that gets sold back to Bay Area farmers. The garbage company has turned 105,000 tons of fodd scraps into 20,000 tons of compost.
Justin Sullivan/Getty Images

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Americans love to eat - and often overeat.

But we also end up wasting a tremendous amount of food - the USDA estimates as much as 30 percent of the groceries we buy and meals we purchase end up in the trash.

Other countries have similar problems.

The BBC's Celia Hatton reports from China.