although ___________ reactions can cause ________ changes and __________, they can also be used to help _____ environmental change.

What does the complete combustion of gasoline in a car's engine produce?

In a cars engine, _______ burns and reacts with _______.

What is incomplete combustion? Why does it occur?

What oxides does the exhaust include and why are they hazardous?

What are catalytic converters?

How do catalytic converters work?

Explain what a catalyst is.