From the text...'An inventory or estimate of total statewide (or some other geographically distinct unit) annual emissions of criteria pollutants is a necessary part of understanding the burden on the air resource in an area and taking appropriate control actions. Emission inventories are a basic requirement of state air resource management programs and are a required element of State Implementation Plans. Emission inventories help explain the contribution of source categories to pollution events, provide background information for air resource management, provide the means to verify progress toward emission reduction goals, and provide a scientific basis for state air programs. An accurate emissions inventory provides a measured, rather than perceived, estimate of pollutant production as the basis for regulation, management action, and program compliance. Emission inventories should include all important source categories including mobile, area, and stationary and are not complete unless difficult-to-quantify sources like agricultural burning, backyard burning, rangeland burning, and wildland and prescribed burning are each addressed. Wildland and prescribed fires are extremely diverse and dynamic air pollution sources and their emissions can be difficult to quantify. Design and development of an emission inventory system is primarily the responsibility of state air regulatory agencies. But cooperation and collaboration between air regulatory agencies and fire managers is required to design an effective and appropriate emission inventory system. Wildland fire managers should have the knowledge and data necessary to calculate emissions from their burn programs and be prepared to work with the state in developing emission inventory systems for wildland fire.'