Ozone Depletion & Water Pollution. Unit 7-1 Notes Mr. Hefti – Pulaski Biology. Ozone Depletion ► What is it?. Thinning of ozone layer Shield of gases 20-50 km above Earth’s surface that absorb UV radiation from sunlight. OD ► What causes it?.
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Unit 7-1 Notes
Mr. Hefti – Pulaski Biology