Answer:
A. development of automobiles with lower nitrogen oxide and hydrocarbon emissions.
Explanation:
This act implements a comprehensive program to reduce air pollution to protect human health and environment, the amends made in 1990 focused on problems of acid rain, ozone depletion, and toxic air pollution, they established new auto gasoline reformulation requirements and set the Reid vapor pressure standards to control evaporative emissions from gasoline.
The mountain ranges made borders
This is because defense mechanisms can stunt emotional growth. A defense mechanism is an oblivious mental component that decreases tension emerging from inadmissible or possibly unsafe boosts. Sigmund Freud was one of the principal defenders of this develop. Guard components work at an oblivious level and help avert disagreeable emotions or improve great things feel for the person.