In a world first, engineers from the University of Cambridge have shown that cement can be recycled without the same steep cost to the environment as making it from scratch.
Cement binds concrete together but the whitish powder is highly carbon-intensive to produce, with the sector generating more than triple the emissions of global air travel.But the notoriously polluting industry has struggled to produce it in a less harmful way to the climate.
"It is an extremely exciting project... I think it's going to have a huge impact," said Allwood, an expert on industrial emissions and key contributor to reports from the UN's scientific panel on climate change. The International Energy Agency says that if emissions from the cement industry continue to increase, a pledge of carbon neutrality by 2050 will almost certainly remain out of reach.
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