The oxidation number of chlorine in the Cl-<span> ion is -1.</span>
Answer:
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Explanation:
Coal, oil and natural gas are called fossil fuels. Fossil fuels are burned to make energy. Burning fossil fuels also releases CO2 (carbon dioxide) gas into the atmosphere. Most air pollutants (such as sulfur dioxide) don't stay in the atmosphere very long.
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C. Biomass is the correct answer
