A pH scale with annotated examples of chemicals at each integer pH value. Image by Edward Stevens.
"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