Coccolithophores are microorganisms that are covered in plate-like shells made out of calcium carbonate (chalk). The chalky shells reflect light, turning the ocean a milky turquoise color.

石灰质鞭毛虫(coccolithophores)是一类覆盖在碳酸钙(粉笔的主要成分)岩石板状外壳上的微生物。

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The conference also gave him the opportunity to promote another Carbon Sciences venture: turning CO2 into precipitated calcium carbonate.

CNN: Turning carbon dioxide into fuel