Scientists say they can make zero-emission cement

Researchers on Wednesday said they were a step closer to solving one of the trickiest problems in tackling climate change—how to keep making cement despite its enormous carbon footprint.

Finland's wizards making food out of thin air

At a factory in Finland, the "farmers of the future" are making a new food protein by feeding a microbe air and electricity, proving that protein can be produced without traditional agriculture.

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