Define Greenhouse effect

Explanation

### Step-by-Step Text Solution:

1. **Introduction to the Greenhouse Effect**: The greenhouse effect is a natural process that warms the Earth's surface. It occurs when the sun's energy reaches the Earth and some of that energy is reflected back to space while some is absorbed and re-radiated by greenhouse gases in the atmosphere.

2. **Sunlight and Earth's Surface**: Sunlight, which is composed of different wavelengths, reaches the Earth. Some of this sunlight is absorbed by the Earth's surface, warming it.

3. **Re-radiation of Energy**: After absorbing sunlight, the Earth's surface emits energy back into the atmosphere in the form of infrared radiation (heat).

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