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CO2 Removal,
powered by nature
THE OPPORTUNITY
A natural carbon sink
Mineral carbonation, the reaction of COâ‚‚ with metal oxides to create carbonates, occurs naturally around the world.
Limestone, or calcium carbonate, is ~15% of the Earth's sedimentary crust, making it a critical global carbon sink.
By harnessing the natural ability of limestone, we can permanently remove COâ‚‚ at the gigatonne level.
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THE CATCH
We need zero carbon lime
If we are to enhance this natural process to remove atmospheric COâ‚‚, we need to produce zero carbon calcium oxide, commonly known as lime. And lots of it. This can act as a “carbon sponge”, absorbing atmospheric COâ‚‚ by forming calcium carbonate.
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However, current methods for producing 1 tonne of lime emit approximately 1 tonne of COâ‚‚, negating any environmental benefit from mineral carbonation.
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OUR SOLUTION
Greener, circular & decentralised lime production, letting lime act as a carbon sink