What is ozone layer depletion? What are the causes and effects of it?

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Ozone Layer Depletion:**
Ozone layer depletion refers to the reduction in the concentration of ozone (O3) in the stratosphere, particularly in the region known as the ozone layer. This layer is crucial as it absorbs the majority of the sun's harmful ultraviolet (UV) radiation.

2. **Causes of Ozone Layer Depletion:**
- **Chlorofluorocarbons (CFCs):** These are man-made compounds that release chlorine atoms when they are broken down by UV radiation. Chlorine is highly effective at destroying ozone molecules.
- **Other Organic Compounds:** Certain organic compounds, including halons, carbon tetrachloride, and methyl chloroform, also contribute to ozone depletion.
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