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APES Air Pollution

QuestionAnswer
Evernia Lichen that sickens and dies when too much SO2 is present
Usnea Lichen that sickens and dies when too much SO2 is present; known as the "old man's beard"
Natural Greenhouse Effect Natural heating by incoming sunlight and certain greenhouse gases that release absorbed energy as heat
Greenhouse Effect Chemicals being added enhance it leading to global warming
Ozone Shield Chemicals being added are depleting ozone
Created by: diego.reyes2
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