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.