Although, this may be due to atmospheric reactions occurring at the puddle site.

Acid rain forms when airborne sulphur dioxide and nitrogen oxides go through a series of complex atmospheric reactions and are turned into weak sulphuric and nitric acids contained in rain drops.

In contrast to volatile organic compounds (VOCs), non-volatile organic compounds are those carbon compounds that do not participate in atmospheric photochemical reactions or evaporate under normal atmospheric conditions.

Kr, the product of atmospheric reactions, is produced with the other naturally occurring isotopes of krypton.

Ozone is formed in an atmospheric reaction involving volatile organic compounds that come from gasoline vapors, surface coating products and solvents, among other sources.

Non-Methane Volatile Organic Compounds (NMVOCs) Organic compounds, other than methane, that participate in atmospheric photochemical reactions.

The natural sources originated either from biology or deposits of nitrates produced by atmospheric reactions.

By turns brutal and benign, El Nino - a vast pool of warm water that appears from time to time in the tropical Pacific and sets off atmospheric reactions around the globe - can show many faces.

It was first isolated by R. Schwarz and M. Schmeißer in 1937 and is hypothesized to be important in the atmospheric reaction of bromine with ozone.