From: "Dave Ings" 

And environmental degradation in general. Oil sands extraction is strip mining.

Not to mention the extraction process uses large amounts of natural gas. So
to some degree you are converting a clean energy source into a dirty one
...
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Regards,
Dave Ings,
Toronto, Canada

"John Beamish"  wrote in message
news:op.tgnjm72fm6tn4t{at}dellblack.wlfdle.phub.net.cable.rogers.com...
> Were then and are now.  Google "tar sands".
>
> Biggest issues:  cost ($$ and energy) of extraction and amount of water
> that is used during the extraction process.
>

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