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View all search resultsHow chocolate could counter climate change
Process locks in greenhouse gases, final product can be used as fertilizer.
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t a red-brick factory in the German port city of Hamburg, cocoa bean shells go in one end, and out the other comes an amazing black powder with the potential to counter climate change.
The substance, dubbed biochar, is produced by heating the cocoa husks in an oxygen-free room to 600 degrees Celsius.
The process locks in greenhouse gases and the final product can be used as a fertilizer, or as an ingredient in the production of "green" concrete.
While the biochar industry was still in its infancy, the technology offered a novel way to remove carbon from the Earth's atmosphere, experts say.
According to the United Nations’ Intergovernmental Panel on Climate Change (IPCC), biochar could potentially be used to capture 2.6 billion of the 40 billion tonnes of CO2 currently produced by humanity each year.
But scaling up its use remains a challenge.
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