a shovel ready project

Under proposals from the Cquestrate project, they aim to reduce ocean acidity while increasingly absorbing CO2 by converting limestone into lime, thereby adding the lime to seawater. Cquestrate, proposed by Tim Kruger, a former management consultant.

While the idea is good in theory, Mr Kruger added that in order for it to properly work, the world would need to mine and process about 10 cubic kilometres of limestone each year to soak up all the emissions the world produces. The CO2 resulting from the lime production would also have to be captured and buried at source.
The Telegraph (UK), 6 Jul 2009