Using the NOx cycle shown below, determine if the sources and sinks for NOx and NO3in the atmosphere are balanced. Use the totals (bottom values). Units are Tg N per year. Knowing that the average precipitation on Earth is approximately 1m per year, calculate the global mean concentration of NO3in rainwater assuming that 50% of all NOx is removed in wet deposition as HNO3. If this were the only source of acidity, what would the pH be for thic rainuator