Abstract:
Since Manokwari became the capital of Papua Barat Province,transportation mean, i.e. vehicles in Manokwari started to increase tremendously. Vehicles are one of transportation tools produce carbon dioxide (CO2) emission. It causes greenhouse gas which contributes to global warming. The ability of absorption of plants through photosynthesis can reduce CO2 emission. The study aims to measure the amount of carbon dioxide emission produced by vehicle activities along the main street in Manokwari and to calculate the number of trees, to be planted along side the street. That can absorb CO2 emission produced by vehicles. The number of vehiclesis calculated by using traffic counting. Total emissions of CO2 obtained from multiplying the number of vehicles with CO2 emissions factor. Observation point is chosen purposively based on peak hours of traffic in the street. The number of trees needed to absorb all of CO2 emission is taken from the result of devision of the total weight of CO2 emission produced by vehicles toward the ability of each tree in absorbing CO2. The data of the ability of CO2 absorption is the secundary data obtain from research done by Endes N. Dahlan. The analysis of simple linear regression by using SPSS program is used to observe the relationship between number of population and number of vehicles. The result of total number of vehicles that pass on the seven main streets in Manokwari are 20.382 vehicles/hour. The amount of carbon dioxide (CO2) emission produced from activities of vehicles along the main streets in Manokwari based on the types of vehicles is 24.081.891,92 kg/year.The need of number of trees which can be planted along side the main street in Manokwari in order to absorb CO2 emission from vehicles is 31 kinds of trees depending on the variation between planting distance and the ability of absorption. The result of linear regression analysis
shows that the relationship between number of population in Manokwari significantly affects the increasing of number of vehicles through the equal simple linear regression y = -66408 + 1,09x. It also reveals that the increasing number of vehicles continuously will cause the increasing and accumulation of CO2 emission in the air and affect the global warming. The amount of CO2 emission in 2020 will increase to 36.208.219,25 kg/year andwill continuously increase to 60.284.112,32 kg/year in 2030. To anticipate the gradual increase of CO2 concentration, it is must to plant trees to create a green belt along side the main street, that have the ability to absorb all CO2emission so that CO2 emission in Manokwari can be minimized in the future
