Emission Inventory – Natural Sources
This page last reviewed March 13, 2013
Natural Sources are non-manmade emission sources, which include biological and geological sources, wildfires, windblown dust, and biogenic emissions from plants and trees.
Areawide Source Methodologies
Find out how ARB calculates emissions from natural source categories.
- Biogenic Sources
- Wildfire Sources
- Smoke Emission Estimation
- Geogenic Sources
Biogenic Emissions Inventory
ARB estimates emissions of biogenic volatile organic compounds (BVOCs) from vegetation for natural areas, crops, and urban vegetation. BVOC emissions are functions of the species leaf mass, emission factors, temperature, and light conditions.