[Cob] Re: Pollution from Production of Portland Cement

[frank]

Hi All,

In Edmonton, Alberta, Canada at least one cement manufacturer 
converted their furnaces back from using natural gas to coal 
because of the cost savings.  The resulting problems are more 
carbon dioxide production as well as increased sulphur dioxide 
production depending on the sulphur content of the coal.  There 
would also be increased pollution (especially coal dust) from moving 
the coal from storage to the furnaces.

bfn,
Frank Hanlan	
Edmonton, AB