Biogenic Emission Sources

The Biogenic Emission Sources webpage published by the U.S. Environmental Protection Agency (EPA) provides an overview of biogenic emissions and the tools used to estimate their contribution to air pollutant emissions inventories. It describes the major natural sources of volatile organic compounds (VOCs), including vegetation, soils, and other ecosystems, and explains their role in atmospheric chemistry and ozone formation. The webpage also introduces the Biogenic Emissions Inventory System (BEIS), outlines its input data requirements and modeling approach, and provides access to documentation, software, technical reports, and related resources to support the estimation of biogenic emissions for air quality modeling applications.