Green plants capture how much of total solar energy.

Explanation

**Step-by-Step Solution:**

1. **Understanding Solar Energy**: The sun emits solar energy, which is the total energy available from sunlight. This energy is essential for life on Earth.

2. **Role of Green Plants**: Green plants, through the process of photosynthesis, capture solar energy. They contain chlorophyll, which allows them to absorb sunlight.

3. **Percentage of Energy Captured**: Out of the total solar energy that reaches the Earth, green plants capture only a small fraction. Specifically, they capture about 1% of the total solar energy.

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