The Princeton scenario-builders recognize that it will be impossible to eliminate all fossil fuel consumption and that the only way to achieve net-zero emissions is to resort to what they label the “fourth pillar” of their overall strategy—to mass-scale carbon capture and storage of emitted CO2—and their calculation requires the removal of 1–1.7 gigatons of the gas per year. When compared on a volume equivalent basis, that would necessitate the creation of an entirely new gas-capture-transportation-storage industry that every year would have to handle 1.3–2.4 times the volume of current US
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