Lesson 9 - Acid Deposition Most of us know this topic by what the media calls it - "Acid Rain". But rain is only one way that polluting emissions reach the ground. This lesson is a look into the causes, impacts and emission reduction strategies for sulfur dioxide and nitrogen oxides, the two main emission-based pollutants. This topic is heavily tied to the lessons on electricity generation (L02) and transportation (L04).

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