Make the sentence fluent: Since the beginning of nuclear power, radioactive waste has remained as a major problem.
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The United States has been a major contributor to the global climate crisis.
The United States has been a major contributor to the climate crisis.
The United States has been a major contributor to the climate crisis.
The United States has been a major contributor to the climate crisis.
The United States has been a major contributor to the climate crisis.
The United States has been a major contributor to the climate crisis.
The United States has been a major contributor to the climate crisis.
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