As the CO2 content of the air continues to rise, it is likely that wheat plants will exhibit significant increases in photosynthesis and yield even under less than favorable growing conditions characterized by elevated atmospheric ozone concentrations and/or pathogenic infections by rust-causing organisms. Thus, it is likely that such detrimental environmental and biotic factors will not threaten world grain production in the years to come, as long as the air's CO2 content is allowed to increase unhindered by mankind's misguided legislative attempts to stabilize the atmospheric concentration of this vital life-supporting gas.