Give the harmful effects of below substances on human health.
Carbon dioxide

Explanation

### Step-by-Step Text Solution

1. **Introduction to Carbon Dioxide**:
- Carbon dioxide is a colorless, odorless gas with the chemical formula CO2. It is produced during respiration and combustion processes.

2. **Harmful Effects on Human Health**:
- **Headache**: Exposure to elevated levels of carbon dioxide can lead to headaches due to reduced oxygen availability in the body.
- **Dizziness**: High concentrations of carbon dioxide can cause dizziness, which is often a result of insufficient oxygen reaching the brain.
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