Professor Davis will discuss some recent and ongoing projects he is involved in, including an effort to estimate global uptake of CO₂ by carbonating cement materials; two studies looking at the availability of large-scale negative CO₂ emissions and the response of the Earth system to such CO₂ removals; an assessment of expert disagreement regarding management of CO₂ emissions from biopower production; and the advantages of a new indicator of sustainable decarbonization, the carbon intensity of wealth.