sentence: Scientists measure reactions in the gas phase, on surfaces and in water.
sentences_before: Measurements made in the laboratory are essential to our understanding of the sources and sinks of pollutants and compounds found in nature. Lab studies tell which gases react with each other and how fast they react.
sentences_after: Scientists also study photochemistry which quantifies how quickly molecules are split apart by sunlight and what the products are. Scientists also study thermodynamic data such as Henry's law coefficients.
concept_name: scientist
headings: Atmospheric chemistry Methodology Lab measurements
categories: Environmental chemistry