The type of rocks we need for storing carbon dioxide have both space for the carbon dioxide (porosity), and pathways for the carbon dioxide to move through (permeability). In this experiment we look at how a fluid cannot move through a rock with holes but no pathways. We also look at rocks which can allow carbon dioxide to flow into the storage spaces. Remember that to store carbon dioxide we compress it to a very dense gas that has liquid-like properties. Some chocolate biscuits and a glass of milk is all that you need for this experiment.

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