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Consider the following.1. Photosynthesis2. Respiration3. Decay of organic matter4. Volcanic action Which of the above add carbon dioxide to the carbon cycle on Earth?

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Consider the following.<br />1. Photosynthesis<br />2. Respiration<br />3. Decay of organic matter<br />4. Volcanic action Which of the above add carbon dioxide to the carbon cycle on Earth?






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