A comprehensive VOC analysis of commercial cannabis facilities enables the highly sensitive detection of over 200 cannabis plant volatiles, including terpenoids and organic sulfur, oxygen, and nitrogen compounds. Only by using the leaf enclosure method can the Byers Emissions Analysis team determine the types and volumes of site-specific terpenes and other compounds emitted by the plant. Ambient air sampling at a cultivation site will provide a very limited view of the complex and highly variable compounds emitted from the cannabis plants. However, our testing and analysis methods, including utilization of Gas Chromatography-Mass Spectrometry (GC-MS), will reveal a canopy’s actual emissions profile, allowing the calculation of a gas-phase emission rate of cultivation or an entire facility. This valuable information can be used to make better informed decisions with respect to cannabis odor control strategy and compliance/risk assessment.