<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>
People can make the best use of ideas,opinions, nature to create more resources when they have the knowledge skill and technology to do so.this is why people are a resource it is the ability of humans to help in transferring a physically material into a valuable resource at any given notice.
Answer:
most men in the northwest culture grew food and hunted