Final answer:
Natural gas emits the least sulfur dioxide when burned compared to coal and oil.
Explanation:
Natural gas emits the lowest amount of sulfur dioxide when burned among the given options. When compared to coal and oil, natural gas combustion releases much less sulfur dioxide along with lower carbon dioxide, nitrogen oxides, and toxic emissions.
Additionally, the combustion of natural gas does not generate ash, making it a preferred choice for reducing environmental impacts.
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