A city has a fleet of 10 gasoline cars and 5 gasoline light trucks built in 2009. The annual vehicle miles (VMT) traveled by these vehicles are 8,000 miles. How many kg of CO2e does the fleet produces in a year? Which fleet of vehicles (i.e. light truck or gasoline car) produces more CO2e and by how much?

Notes:

Fuel efficiency of gasoline car = 23.8 mpg

Fuel efficiency of light truck = 17.4 mpg

Emission factor of N2O from gasoline car = 0.020 gm/mile

Emission factor of CH4 from gasoline car = 0.021 gm/mile

Emission factor of N2O from light truck= 0.029 gm/mile

Emission factor of CH4 from light truck = 0.025 gm/mile

Emission factor of gasoline = 8.78 kg CO2/gallon