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January 23 2013

Study: olivine in the oceans is not an effective carbon sink


Dumping huge quantities of olivine into the oceans isn't a cost-effective method of sequestering carbon emissions, according to a new study.

Olivine (a pretty green magnesium iron silicate) is commonly found across the Earth's surface, and has been considered a potential tool for geoengineering. However, researchers from the Alfred Wegener Institute for Polar and Marine Research in Bremen have concluded that the difficulties in manufacturing and disseminating the required quantities of olivine make it an impractical geoengineering method.

The mineral, which can give beaches distinctive green sand, is a natural carbon sink.

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