The use of biomass via BECCS to capture carbon is likely a rapidly deployable and effective method to sequester CO2 at low cost without major alterations in land use. Enzymes, particularly RubisCO and carbonic anhydrase, provide an intermediate strategy for CO2 capture and an alternative to physical and chemical capture methods. Of the chemical methods, mineral carbonation (likely ex situ) may provide the most expedient method to capture CO2 emissions, while concrete carbonation may be useful if it improves concrete strength and reduces overall concrete use.