Good article!

While it contained some interesting information on oil sands tailings ponds and abandoned oil wells in Alberta it seemed to gloss over the issue of abandoned mines in Ontario and Quebec.

Here's a couple of points from the MiningWatch Canada website:
-There remains over 5000 abandoned mines that have not been remediated in Ontario, many of them hazardous to the public, some seriously so!
-Ontario remains the only province in Canada with no Environmental Assessments required for large mines!

For a very interesting take on this issue I'd suggest watching the documentary "The Hole Story" , lots of information and graphic images of mines and tailings ponds in Quebec and Ontario. Just google "National Film Board The Hole Story" and you'll find a link that will take you directly to the documentary. Grab a coffee and enjoy the 1 hour and 20 minute show!