Emissions Inventory has long been a vital link in the air pollution equation. With the changes in the PM standard and the effects of transport in the Ozone and PM arena, this area is one in which much change is occurring. Emissions Inventory has long been a vital link in the air pollution equation. With the changes in the PM standard and the effects of transport in the Ozone and PM arena, this area is one in which much change is occurring. Emissions Inventory has long been a vital link in the air pollution equation. With the changes in the PM standard and the effects of transport in the Ozone and PM arena, this area is one in which much change is occurring. Emissions Inventory has long been a vital link in the air pollution equation. With the changes in the PM standard and the effects of transport in the Ozone and PM arena, this area is one in which much change is occurring. Emissions Inventory has long been a vital link in the air pollution equation. With the changes in the PM standard and the effects of transport in the Ozone and PM arena, this area is one in which much change is occurring. Emissions Inventory has long been a vital link in the air pollution equation. With the changes in the PM standard and the effects of transport in the Ozone and PM arena, this area is one in which much change is occurring.