About 70% of total global carbon is found in

Options

A. forests
B. grasslands
C. agroecosystems
D. oceans

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks where about 70% of the total global carbon is found. This requires knowledge of carbon distribution in various ecosystems.

2. **Identifying Carbon Sources**: Carbon is primarily found in the atmosphere as carbon dioxide, which is absorbed by plants during photosynthesis. This is the starting point for understanding where carbon is stored.

3. **Examining Carbon in the Atmosphere**: The amount of carbon in the atmosphere is approximately 700,000 million tons. This is a relatively small portion compared to other reservoirs of carbon.

4. **Considering Carbon in Oceans**: Oceans hold a significant amount of carbon, more than 50% of the atmospheric carbon. This indicates that oceans are a major carbon sink.

5. **Recognizing the Role of Living Organisms**: The majority of carbon is stored in living organisms, particularly in marine ecosystems. This suggests that the oceans, which are rich in biodiversity, contain a large amount of carbon.

6. **Evaluating Other Ecosystems**: Other ecosystems such as forests, grasslands, and agro-ecosystems do contain carbon, but they do not account for as much as the oceans do. Therefore, they cannot be the correct answer.

7. **Conclusion**: Based on the information gathered, the correct answer is that about 70% of total global carbon is found in the oceans.

**Final Answer**: About 70% of total global carbon is found in the oceans.

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