Inventory of aur pollution from the Tanzania transport sector

The inventory of air pollutants from the transport sector in Tanzania from the year 1995 through 2005 was done to show the connection between transportation and air pollutants. Used on IPCC methodology and SEI manual, the air pollutants estimation was done. The amount of CO2, CO, NOR, N20, CH4, particulate matter (PM10) and SO2 emitted showed an average increase of 7.42%, 7.86%, 7.42%, 6.68%, 7.15%, 7.80% and 6.87% respectively per year. Rapid urbanization, poor town planning leading to unnecessary long routes and traffic congestion, the rising rate of motorization, increased trip rates, and use of old and unmaintained transport vehicles were among the factors that cause such increases in amount of pollutants released into the atmosphere from transportation sector. In the year 2005, the ammonia emission was 0.009 Gg that is 1 1.1 1% higher than that in 2004. The emissions of NMVOC increased steadily from 2000 to 2004 with an average increase of 5.80% per year. From the year 2004 through 2005, there had been a tremendous increase in NMVOC produced to about 12.50% per year. This could be due to the reasons, which include start-up in mornings, inefficient, old, poorly maintained vehicles, and slow driving during the peak hours. Lastly, the study revealed that activity data in Tanzania is poorly kept and data on transportation is hard to get. Sources of information and data are dispersed and the information lacks details and therefore the exercise of compiling inventory is difficult. This study may have uncertainty due to adoption of emission factor estimates from other countries. There is therefore a need of developing a database, which will be a source of information (emission factors and activity data) when compiling inventories, conducting regular surveys and emission monitoring by vehicles and fuel type.