Because it was harder to travel over moountains.
<span>A. It established federal emissions standards
</span>The enactment of the Clean Air Act of 1970 (1970 CAA) resulted in a major shift in the federal government's role in air pollution<span> control. This legislation authorized the development of comprehensive federal and state regulations to limit </span>emissions<span> from both stationary (industrial) sources and mobile sources.</span>
The correct answer is true. In addition, solidarity is also
defined as an agreement in regards to feelings or unity by which individuals are
likely to have one goal or common interest and that what they have in common is
mutual support.