A coalition of agriculture groups has proposed paying farmers $100/acre to implement climate-smart practices. The total price tag of $40 billion a year is substantially above the amount proposed in climate legislation currently before the U.S. Congress and would have broader objectives than just carbon sequestration. The total amount of land used for crops has declined over time as productivity has improved. Concurrent with the reduced use of land for crops has been an increase in forested land, which is about double the area planted to crops. Land not in forests and not used for pasture or cropland has been relatively stable at about roughly double the amount used for crops. Roughly a quarter of all U.S. land is used for crops. The larges...