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Ozone Depletion - Chapter 9 - UNEP Training Manual on International Environmental Law
… 9. OZONE DEPLETION I. Introduction 1. The Earth’s atmosphere is … which extends up to 350 kilometres from Earth. 2. Ozone, which has the chemical formula of “O3,” is a molecule … mainly in two regions of the Earth's atmosphere. Most ozone (approximately 90%) is found in the stratosphere. This …