Producers in the hydrothermal vents on the ocean floor use CO? for their carbon source and what for energy?

Name: Producers in the hydrothermal vents on the ocean floor use CO? for their carbon source and what for energy?
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Producers in hydrothermal vents, such as chemosynthetic bacteria, use sulfide (H2S) as an energy source to fix carbon dioxide (CO2) into organic compounds, a process distinct from photosynthesis which uses light.

Producers in the Hydrothermal Vents on the Ocean Floor Use