Natural gas burns with a relatively clean flame. Which of the following potential pollutants is produced in significant quantities during the combustion of natural gas in air?
A) sulfur oxides
B) nitrogen oxides
C) metal oxides
D) All of the above are produced in significant quantities.
Question 2
When natural gas is burned in insufficient air, ________ can be (a) major product(s).
A) water
B) carbon and soot
C) methane
D) octane