California Air Resources Board

The Non-Agricultural Open Burning category includes emissions from intentional burning for waste disposal purposes of leaf and brush in outdoor areas. This methodology estimates emissions of fine particulate matter (PM), particulate matter with a diameter of 10 microns or less (PM₁₀), particulate matter with a diameter of 2.5 microns or less (PM_2.5), oxides of nitrogen (NO_X), carbon monoxide (CO), and ammonia (NH₃) resulting from these emissions.