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A pH scale with annotated examples of chemicals at each integer pH value. Image by Edward Stevens.
Acids in the Atmosphere
"Acid rain woods1" by Nipik. Licensed under Public Domain via Wikimedia Commons
Syllabus - 9.3 The acid environment : 2. Acid oxides in the atmosphere.
NASA | A Year in the Life of Earth's CO2
An ultra-high-resolution NASA computer model has given scientists a stunning new look at how carbon dioxide in the atmosphere travels around the globe