Which of the following human activities results in global warming?

Options

A. Fishing
B. Mining
C. Cultivation
D. Afforestation

Answer

To determine which human activity results in global warming, we need to analyze the options provided: fishing, mining, cultivation, and afforestation.

### Step-by-Step Solution:

1. **Understand Global Warming**: Global warming refers to the unusual increase in the Earth's average temperature due to the accumulation of greenhouse gases in the atmosphere. These gases trap heat and lead to climate change.

2. **Analyze Each Activity**:
- **Fishing**: This activity primarily involves catching fish and does not significantly contribute to greenhouse gas emissions. Therefore, fishing does not result in global warming.
- **Mining**: Mining involves extracting minerals and fossil fuels from the Earth. The extraction and burning of fossil fuels (like coal, oil, and natural gas) release significant amounts of carbon dioxide (CO2) and other greenhouse gases into the atmosphere, contributing to global warming.
- **Cultivation**: This refers to agricultural practices. While certain agricultural practices can contribute to greenhouse gas emissions (like methane from livestock), cultivation as a whole does not directly result in global warming.
- **Afforestation**: This is the process of planting trees in an area where there was no previous tree cover. Afforestation is generally considered beneficial for the environment as it helps absorb CO2 from the atmosphere, thus mitigating global warming.

3. **Conclusion**: Among the activities listed, mining is the one that results in global warming due to the release of greenhouse gases during the extraction and use of fossil fuels.

### Final Answer:
**Mining** is the human activity that results in global warming.