UFORE (Urban Forest Effects model)
system that uses field data to provide information on the amount and value of atmospheric contaminant removal. carbon storage. and energy conservation.
unavailable water
soil water that is held so tightly to the soil particles that it cannot be absorbed by plant f roots (contrast with available water).
uncertainty reduction
risk control strategy in which one attempts to learn more about the risk in order to increase the ability to predict what will happen.