Not urban land use, but in the literal sense: land used to produce food, graze livestock, supply drinking water, grow trees, and sequester carbon. As the climate warms and the population grows, crop yields will decrease and land will be degraded.
Did you know that sweet potatoes are only produced in a small area of North Carolina? Or that flaxseed is only grown in the country's remote northern reaches? Crop maps published by the USDA paint an interesting picture of American agriculture.