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Environment › Ecological Theory

Environment › Ecological Theory

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Consider the following:
1. Photosynthesis
2. Respiration
3. Decay of organic matter
4. Volcanic action
Which of the above add carbon dioxide to the carbon cycle on earth?

Options

(a)

1 and 4 only

(b)

2 and 3 only

(c)

2, 3 and 4 only

(d)

1, 2 ,3 and 4

Answer

(C)