Uncertain storage prospects create a conundrum for carbon capture and storage ambitions

Grand hopes exist that carbon capture and storage can have a major decarbonization role at global, regional and sectoral scales. Those hopes rest on the narrative that an abundance of geological storage opportunity is available to meet all needs. In this Perspective, we present the contrasting view that deep uncertainty over the sustainable injection rate at any given location will constrain the pace and scale of carbon capture and storage deployment. Although such constraints will probably have implications in most world regions, they may be particularly relevant in major developing Asian economies. To minimize the risk that these constraints pose to the decarbonization imperative, we discuss steps that are urgently needed to evaluate, plan for and reduce the uncertainty over CO₂ storage prospects.