. The Case against the rain : a report on acid precipitation and Ontario programs for remedial --. Acid rain. DEFINING THE PROBLEM Research Group The Canada-United States Research Consultation Group on the Long-Range Transport of Air Pollutants (LRTAP) was established in 1978 by the two govern- ments to co-ordinate research studies and programs, and to expedite the exchange of scientific information. A preliminary report, by the Group, issued in Octo- ber 1979, points out that adverse effects from pollut- ants transported over long distances result from the accumulation of
. The Case against the rain : a report on acid precipitation and Ontario programs for remedial --. Acid rain. DEFINING THE PROBLEM Research Group The Canada-United States Research Consultation Group on the Long-Range Transport of Air Pollutants (LRTAP) was established in 1978 by the two govern- ments to co-ordinate research studies and programs, and to expedite the exchange of scientific information. A preliminary report, by the Group, issued in Octo- ber 1979, points out that adverse effects from pollut- ants transported over long distances result from the accumulation of material deposited over a long period at low concentrations, and the synergistic or additive effects of a combination of materials. This is in contrast to local pollution situations where damage, or effects on health and comfort, result usually from elevated ambient air concentrations during an "air pollution episode" over a limited time period. Conventional air quality standards therefore are not designed for these more subtle and cumulative long-term effects. Origin and Amounts of Emissions* The Group's recent report gives 1975 estimates of sulphur dioxide and nitrogen oxide emission for the two countries, along with maps showing the geograph- ical distribution of emissions. (FIGS. 4and 5) The report is concerned basically with eastern North America, which embraces the industrial heartlands of both countries, wherein lie most of the aquatic ecosys- tems which are vulnerable to acidic precipitation. For example, three-quarters of the total Canadian emis- sions of SO2 and two-thirds of total Canadian emis- sions of NOx are east of the Manitoba/Saskatchewan border. *all tonnage throughout report in "standard" or short tons. Annual sulphur dioxide (SO2) emissions were estimated at million tons in Canada and million tons in the United States. It was projected that there would be modest SO2 increases by the end of the century, despite abatement measure
Size: 2191px × 1141px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectiongovernmentpubli, bookleafnumber18
