Beer made from leftover bread and an augmented reality app for online learning are winning ideas in innovation competition

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Every day, Hong Kong disposes of up to 3,500 tonnes of food waste, according to the Environment Bureau. That’s equivalent to the combined weight of around 500 male African elephants.

Four students at the Hong Kong University of Science and Technology (HKUST) got a first-hand look at such waste as bakeries near their campus threw away unsold goods such as bread, cakes and sandwiches at the end of each day.

“We realised food waste is a problem we would love to solve, but at…


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