PAST TRACK AND FUTURE PERSPECTIVE OF AIR QUALITY ISSUES IN JAPAN
Road transport consumes a tremendous amount of fuels, and emits an enormous amount of air pollutants and greenhouse gas. This causes great burdens on the regional and global environment, and greatly affects sustainable development of our society. Due to the above emissions from the road transport, air quality problems have been carried over from the 20th century and are still serious. One of the air quality problems is air pollution induced by air pollutants emissions contributed by the road transport particularly in urban areas. The other is the global warming incurred by emissions of carbon dioxide from automobiles. This paper deals with relationship between the road transport and both of the above air quality problems. As to the air pollutions, which are caused by sulfur dioxide, carbon monoxide, nitrogen dioxide, suspended particulate matters, etc., the author states their current status as well as their past track. Some of the air pollutants emitted have become much less than ever, and the air pollution problems concerned with those pollutants are resolved; and however the other air pollution problems, which are caused by the air pollutants being emitted still much, remain. Further the author predicts that emissions of nitrogen oxides and particulate matters will decrease very much due to scheduled strengthening of automobile emission regulations, and that the remaining problems will be greatly improved in future. As to the global warming, he states how much the road transport has been recently contributing to it through its emissions of carbon dioxide, what measures are being taken to abate the problem, and how much the problem will be improved in future by the measures. This paper has treated the air quality issues. The air pollution by SO2 and CO has been resolved by the development of environmental technologies. The remaining air pollution by NO2 and SPM are being improved compared to what it was, but are still a problem in the metropolitan areas. Nevertheless, it is predicted that the air pollution will be significantly improved by the scheduled strengthening of regulations on automobile gas emissions. The air pollution has been improved and is to be overcome in future by the development of environmental technologies. The global warming caused by the emissions of greenhouse gases like CO2 appears to be delayed by the development of technologies for energy efficiency like fuel cells, but to be difficult to avoid since the developed countries continue to emit a huge amount of CO2, although they make best efforts to reduce it, and the developing countries increase their CO2 emissions as their economies grow. This is a problem deeply related to our living styles and economic structure. Though the technological development for efficient use of energy is important, it is more important to alter our living styles and economic structure so as to emit less CO2 enough to avoid harmful impacts of the global warming.
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ARRBMelbourne, Victoria Australia
- OHNISHI, H
- Proceedings of the 21st ARRB and 11th REAAA Conference. Transport. Our Highway to a Sustainable Future
- Location: Cairns, Australia
- Date: 2003-5-18 to 2003-5-23
- Publication Date: 2003
- Features: Figures; References;
- Pagination: 13 p.
- Publication of: ARRB Transport Research, Limited
- Publisher: ARRB
- ISSN: 0158-0728
- TRT Terms: Air pollution; Air quality; Automobiles; Carbon dioxide; Emission control systems; Environmental impacts; Exhaust gases; Global warming; Greenhouse gases; Sulfur dioxide
- Geographic Terms: Japan
- Subject Areas: Environment; Highways; Planning and Forecasting; Vehicles and Equipment; I72: Traffic and Transport Planning;
- Accession Number: 00964459
- Record Type: Publication
- ISBN: 087659229X
- Files: TRIS, ATRI
- Created Date: Oct 28 2003 12:00AM