Tree planting helps in reducing global warming as trees

Options

A. Can respire in light
B. Give out `O_3`
C. Create shade thereby cooling the ground
D. Can sequester `CO_3`

Answer

To solve the question "Tree planting helps in reducing global warming as trees," we need to analyze the options provided and determine which one correctly explains how trees contribute to reducing global warming.

### Step-by-Step Solution:

1. **Understand the Role of Trees**: Trees play a crucial role in the environment, particularly in relation to carbon dioxide (CO2) levels in the atmosphere. They absorb CO2 during the process of photosynthesis, which helps mitigate the greenhouse effect and global warming.

2. **Evaluate Each Option**:
- **Option 1: Can respire in light**: This statement is incorrect. While trees do perform photosynthesis in light, they also respire at all times (day and night). Therefore, this option does not accurately describe how trees help in reducing global warming.

- **Option 2: Give out O3**: This option is also incorrect. Trees primarily release oxygen (O2) during photosynthesis, not ozone (O3). Thus, this does not relate to the reduction of global warming.

- **Option 3: Create shade by cooling the ground**: While trees do provide shade and can help cool the surrounding area, this effect does not directly address the reduction of global warming. Therefore, this option is not the correct answer.

- **Option 4: Can sequester CO2**: This is the correct option. Trees absorb carbon dioxide from the atmosphere during photosynthesis and store carbon in their biomass. This process, known as carbon sequestration, directly contributes to reducing the concentration of greenhouse gases in the atmosphere, thus helping to mitigate global warming.

3. **Conclusion**: Based on the evaluation of the options, the correct answer is **Option 4: Can sequester CO2**. Tree planting helps reduce global warming primarily through this mechanism.

### Final Answer:
Tree planting helps in reducing global warming as trees can sequester CO2.

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