Answer:
The Motor Vehicle Air Pollution Control Act was proposed by an amendment to the clean air act.
Step-by-step explanation:
The clean air act was started in 1963 by the government of the U.S in order to contamination of the air.
The Motor Vehicle Air Pollution Control Act was amended in 1965, which gave the government rights to set standards against pollution that arose from certain kinds of vehicles.
Second amendment to this Act gave the federal government to take further actions and stop any vehicle that polluted the air.