1. Metrobus serves St. John's City by operating a fleet of 54 diesel-run buses. The fleet buses travel about 3,028,144 km annually. Calculate the NH3 emissions using WebFIRE. Use mobile sources; highway vehicles, diesel, light duty diesel trucks, urban local, total.
2.  For the previous question, how about particulate, CO2, CO, SO2, SOx, NO2, and NOx? You might not find them in WebFIRE!
3.  Diesel engines, such as those powering the Metrobus fleet, emit cancer-causing agents. What are these compounds? What are their effects? Support your answer with data.
4.  St. John's International Airport serves about 120 landings per day; 40% are small private aircraft (e.g., Cessna and equivalents), 40% are midsize (e.g., Bombardier Dash Q400), and 20% are large passenger/cargo aircraft such as Boeing and Airbus. Estimate the Greenhouse gas emissions and particulate from landings and takeoffs emitted at St. John's International Airport.
5. Using the World Air Quality Ranking (www.iqair.com/ca/), list the world top 10 air-polluted cities and top 10 air-cleanest cities. Where is St. John's city ranked?