Which of the following is not responsible for degradation of our environment?

Question

Accepted Answer

The correct answer is **3. Afforestation**.

### Explanation:

1. **Solid waste disposal**: This is a significant contributor to environmental degradation. Improper disposal of solid waste can lead to pollution of land, water, and air, harming ecosystems and human health.

2. **Deforestation**: This process involves the clearing of forests for agriculture, urban development, or other purposes. Deforestation leads to loss of biodiversity, disruption of water cycles, and contributes to climate change by increasing carbon dioxide levels in the atmosphere.

3. **Afforestation**: This is the practice of planting trees in an area where there was no previous tree cover. Afforestation is beneficial for the environment as it helps to restore ecosystems, improve air quality, enhance biodiversity, and combat climate change by sequestering carbon dioxide. Therefore, it is not responsible for environmental degradation; rather, it is a solution to mitigate it.

4. **Use of fossil fuels**: The burning of fossil fuels for energy is a major source of greenhouse gas emissions, leading to air pollution and contributing to climate change. This practice is a significant factor in environmental degradation.

### Conclusion:
Among the options provided, afforestation is the only activity that contributes positively to the environment, while all the other options are associated with environmental degradation. Thus, option 3 is the correct answer.