Nearly 1.5 billion tons. That's how much spoiled and uneaten food people around the world throw out each year. In the U.S., roughly 40% of the food supply is wasted, according to the Natural Resources Defense Council (NRDC). But that kind of trash could soon become a lot more useful.
Building on efforts to turn grains and even human waste into biofuels and other valuable chemicals, Carol Lin, a biochemical engineer at the City University of Hong Kong, is developing a new kind of biorefinery. To head off a crisis at Hong Kong's landfills--they're going to be full within five years--she...
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