Nitrous oxide (N20) is produced by bacteria in the natural denitrification process. It is chemically inert in the troposphere, but in the stratosphere it is degraded photochemically. The average concentration of N20 in the troposphere is about 251 ppb, and its residence time there is 10.5 years. What is the global rate of production of N20 in units of kg/year? Assume a temperature of 0.00 C and a pressure of 1.00 atm. Assume that the volume of the troposphere (at 0.00 C and 1.00 atm) is 90% of that of the atmosphere (4.30*1021 L). (Hites, Chapter 4, Problem 9) Answer: