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