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Ozone layer depletion refers to the gradual thinning of the ozone layer in the stratosphere due to the release of harmful chemicals into the atmosphere. The ozone layer acts as a protective shield that absorbs most of the sun’s harmful ultraviolet (UV) radiation, especially UV-B rays. Without this protection, excessive UV radiation reaches the Earth’s surface, causing serious environmental and health problems. The main causes ______ ______ __________ _______ __________ _________ ________ _______.
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