About 70% of total global carbon is found in :

Options

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

Answer

To solve the question "About 70% of total global carbon is found in:", we can follow these steps:

### Step 1: Understand the options given
The options provided are:
1. Ocean
2. Forest
3. Grassland
4. Agro ecosystems

### Step 2: Analyze each option
- **Ocean**: The ocean is known to be a significant carbon sink and contains a vast amount of carbon in the form of dissolved CO2 and carbonates. It is often cited as the largest reservoir of carbon on Earth.

- **Forest**: Forests do store carbon, primarily through the process of photosynthesis where trees and plants absorb CO2. However, the total amount of carbon stored in forests is significantly less than that in oceans.

- **Grassland**: Similar to forests, grasslands also capture some carbon through plant growth, but the total carbon storage is lower compared to oceans.

- **Agro ecosystems**: Agricultural systems can store carbon, but they generally have lower carbon storage capacity compared to natural ecosystems like oceans and forests.

### Step 3: Determine the correct answer
Based on the analysis, the ocean is known to hold about 70% of the total global carbon, making it the correct answer.

### Conclusion
The correct answer to the question is **Ocean**.

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