Air pollution : Mass Killer in Dhaka City
capital city of Bangladesh has a population of about 9 million that
is projected to grow to about 16 million by year 2015, making it the
seventh largest mega city in the world.
constitute the dominant source of air pollution in Dhaka. Two categories
of vehicles making significant contributions to overall fine particulate
emissions are two-stroke engine three-wheelers and heavy-duty diesel
vehicles. As vehicle ownership and use are growing rapidly, the need
to initiate pollution control activities is urgent. A large number of
pedestrians, drivers, passengers, traffic policemen, street vendors
and other groups undoubtedly suffer from significant health damage as
a result of exposure to emissions from a large variety of motorized
vehicles including two-stroke auto rickshaws or "baby taxis", trucks,
buses, cars and two-wheelers. They are responsible for 25% of the particulate
matter and 60% of the toxic and smog-forming hydrocarbons contributed
by all motor vehicles.
Emission inventories of NOx and SOx have usually been made on national basis mainly for general administrative purposes and public information, systematic data published for the use of the scientific data is rather scarce. Nationwide SOx and NOx were calculated based on sulfur content and statistics of fuel consumption estimates of emission factors specific to individual source categories over time.
countries like Bangladesh is characterized by a rapid increase of energy
consumption accompanied by a rapid growth of population and economic
activities. Thus the increasing contribution of atmospheric loads of
SO2 and NOx to global climate change is anticipated and it is really
necessary to quantify these emissions in a hurried manner. A national
steering committee should establish with local and expatriate Bangladeshi
experts to deal with the problem.
increasing air pollution is impeding Bangladesh's development and it
is indeed a matter that should be addressed seriously. It is not only
the health cost that is going to be enormous and burdensome on the national
exchequer, but the loss of potential working ability of the people due
to poor health conditions, experts observed.
» BBS (1996) Statistical Yearbook of Bangladesh, Bangladesh Bureau of Statistics, Government of Bangladesh
» Md. Masud Karim, Ph.D.Consulting Engineer,Dainichi Consultant Inc., 3-1-21Yabuta Minami,Gifu 500,Japan
» Chen Jian, Xinhua General News Service, 7 February 2001