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首页> 外文会议>Specialty Conference on Emission Inventory: Living in a Global Environment Vol.1 Dec 8-10, 1998, New Orleans, LA >Minnesota Air - Air Quality and Emissions Trends: 1985-1995
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Minnesota Air - Air Quality and Emissions Trends: 1985-1995

机译：明尼苏达州空气-空气质量和排放趋势：1985-1995

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摘要

This paper presents Minnesota air quality and air pollutant emission trends over a period of 10 years (1985-1995). Two types of trend are illustrated: emissions and ambient air concentrations. Results show that automobiles and other non-point sources contribute more to air pollution in Minnesota than point sources. For most air pollutants, the trend in both emissions and ambient air concentrations was downward. Emissions and ambient concentrations of carbon monoxide, sulfur dioxide, particulate and lead declined. Ambient concentrations of ozone, and emissions of volatile organic compounds, the chemicals leading to ozone formation, also declined. This was primarily due to lower emissions from coal-burning power plants, less wood combustion, the phaseout of leaded gasoline, stricter vehicle emissions standards, and voluntary reductions by industries. Emissions and ambient concentrations of nitrogen oxides, however, increased, largely because of more use of gasoline, coal and natural gas. Minnesota's C02 emissions, the gas most responsible for global warming, also increased. Although Minnesota's air toxics emission trends show improvement, ambient concentrations of selected air toxics in large urban areas exceeded health guidelines. A new set of policy tools is needed to manage emerging environmental issues such as the cumulative impacts of automobiles and other non-point sources.
机译：本文介绍了明尼苏达州10年间（1985-1995年）的空气质量和空气污染物排放趋势。说明了两种趋势：排放和环境空气浓度。结果表明，与其他点源相比，汽车和其他非点源对明尼苏达州的空气污染影响更大。对于大多数空气污染物，排放量和周围空气浓度的趋势都在下降。一氧化碳，二氧化硫，颗粒物和铅的排放和环境浓度下降。臭氧的环境浓度以及导致臭氧形成的化学物质挥发性有机化合物的排放也有所下降。这主要是由于燃煤发电厂的排放降低，木材燃烧减少，含铅汽油的淘汰，更严格的车辆排放标准以及各行业的自愿减排。但是，氮氧化物的排放和环境浓度增加了，这主要是因为更多地使用了汽油，煤炭和天然气。明尼苏达州的二氧化碳排放量（导致全球变暖最主要的气体）也有所增加。尽管明尼苏达州的空气中毒物排放趋势有所改善，但大城市地区选定的空气中毒物的环境浓度超过了健康准则。需要一套新的政策工具来管理新出现的环境问题，例如汽车和其他面源的累积影响。

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