In the United States the largest source of acid-causing pollutants is the coal 
     
     burned for electricity generation. In Canada the smelting of sulfur—rich ores 
     
     and use of coal in thermal electric generating stations are major sources. With 
     
     the current energy crisis and the resulting increased reliance on coal as a 
     
     power source, the acid rain problem is likely to intensify unless appropriate 
     
     control measures are taken. 
     
    
   
   
    
     ,Most problems arise and occur in Central Canada, but the impacts are spreading. 
     
     Research has shown that high sulfate contaminated air masses move from the 
     
     Great Lakes to Nova Scotia giving the Maritimes acid rain. In Alberta, sour 
     
     gas processing and tar sands development will be major problems in the future. 
     
     Harmful emissions will likely increase by 28 percent in the next 6 years, 
     
     according to the federal government. 
     
    

    
     Further information about the conference is available from the Canadian Nature 
     
     Federation, 75 Albert Street, Ottawa; telephone 238-6154 or the Federation of 
     
     Ontario Naturalists, 355 Lesmill Road, Don Mills; telephone 444—8419.