Which of the following human activities does not contribute to global warming?

Options

A. Deforestation
B. Transportation
C. Communication
D. Industrialization.

Answer

To determine which of the following human activities does not contribute to global warming, we need to analyze each option provided:

1. **Deforestation**: This activity involves the cutting down of trees, which reduces the forest area. Trees play a crucial role in absorbing carbon dioxide (CO2) from the atmosphere. When trees are cut down, not only is this absorption reduced, but the carbon stored in the trees is also released back into the atmosphere, contributing to global warming. Therefore, deforestation does contribute to global warming.

2. **Transportation**: This refers to the movement of people and goods, primarily using vehicles. Most vehicles run on fossil fuels like petrol and diesel, which release greenhouse gases, particularly carbon dioxide, when burned. These emissions significantly contribute to global warming. Hence, transportation is also a contributor to global warming.

3. **Communication**: This is the process of exchanging information between individuals. Unlike the other activities, communication does not involve the burning of fossil fuels or the emission of greenhouse gases. It is a two-way process that does not cause pollution. Therefore, communication does not contribute to global warming.

4. **Industrialization**: This involves the establishment of factories and industries, which typically emit large amounts of smoke and pollutants, including carbon monoxide. Carbon monoxide can be converted into carbon dioxide, a greenhouse gas that contributes to global warming. Thus, industrialization is a significant contributor to global warming.

After analyzing all the options, we conclude that the human activity that does not contribute to global warming is **Communication**.

### Steps Summary:
1. Analyze deforestation: It contributes to global warming by reducing trees that absorb CO2.
2. Analyze transportation: It contributes to global warming through emissions from fossil fuel combustion.
3. Analyze communication: It does not contribute to global warming as it does not involve pollution.
4. Analyze industrialization: It contributes to global warming through emissions from factories.

### Final Answer:
The human activity that does not contribute to global warming is **Communication**.