Once an environmental bill becomes a law, who is usually responsible for the enforcement? a regulatory agency citizens a legislature the president or prime minister

The answer is the president or the prime minister.

Explanation:

Whenever any bill has to be passed, it must pass both the houses by a majority of vote.

When it has been passed with majority, the bill comes to the President.

If the President signs that bill, it becomes a law.

This process is called "overriding a veto."

Therefore, the president or prime minister is usually responsible for the enforcement.

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