Single cell protein can be useful in all, except

Options

A. Reducing environmental pollution
B. Decreasing pressure on agriculture
C. Preventing shift from meat to grain as diet by human beings
D. Being acceptable as food in future

Answer

To solve the question regarding the usefulness of single cell protein (SCP), we need to analyze the options provided and determine which one does not align with the benefits of SCP.

### Step-by-Step Solution:

1. **Understanding Single Cell Protein (SCP)**:
- Single cell protein refers to protein extracted from unicellular microorganisms such as algae, yeast, and fungi. It is edible and can serve as a food source.

2. **Evaluating the Options**:
- **Option 1: Reducing environmental pollution**:
- SCP can help reduce environmental pollution as certain microorganisms can absorb pollutants and improve the environment. This option is valid.

- **Option 2: Decrease pressure on agriculture**:
- SCP provides an alternative protein source that can reduce the reliance on traditional agricultural practices for protein production. This option is also valid.

- **Option 3: Preventing shift from meat to grain as diet by human beings**:
- This option suggests that SCP can prevent the dietary shift from meat to grain. However, SCP does not prevent this shift; rather, it provides an alternative source of protein but does not directly influence dietary preferences between meat and grain. This option is not valid.

- **Option 4: Being acceptable as food in the future**:
- SCP is considered a viable food source for the future due to its high protein content and sustainability. This option is valid.

3. **Conclusion**:
- The option that does not align with the usefulness of single cell protein is **Option 3: Preventing shift from meat to grain as diet by human beings**.

### Final Answer:
Single cell protein can be useful in all, except **preventing shift from meat to grain as diet by human beings**.

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