Why does the united states regulate automobile manufacturing in so many ways?

The US regulates automobile manufacturing to offset air pollution.

Explanation:

Automobiles are a major source of air pollution. The smoke emitted by automobiles consists of a number of harmful gases that adversely affect the environment in a number of ways.  

If the manufacturing of automobiles is not regulated, increased production and use of automobiles will create greenhouse gases and contribute to global warming and climate change.  

it would have concentrated power in the executive branch of the government. it would have restored balance among the three branches of government. it would have set a precedent for government intervention in the economy. it would have signaled an end to all the programs of roosevelt’s new deal.

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2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.