Assume an ozone (O3) level of 500 parts per billion (ppb) and a decay rate of 0.35 d'. a) Estimate time required for ozone level to meet air quality standard

of 70 ppb b) Determine the ozone concentration in µg/m³ at T = 0°C and P = 1 atm c) Discuss impact of ozone at street level, in the atmosphere and in the stratosphere