...while tragic, does not, in my opinion, argue for blasting off mountain tops as the new and safer alternative. This method of mining wasn't chosen based on safety considerations, it was chosen based on the corporate bottom line.
Burning coal, as with other fossil fuels, contributes to global warming and environmental pollution/degradation at levels that are simply no longer acceptable. We need to make use of clean alternatives.
As to your question of replacing lost energy production, I'd say this is why fossil fuel burning should be phased out over time. Our government does not put anything meaningful into alternative energy R&D programs, it's all in the hands of big corporations who don't want change.
Here's a pretty good presentation on mountain topping that's now going on in West Virginia:
1 of 5:
http://youtube.com/watch?v=ziuFW-7h1LM&feature=related 2 of 5:
http://youtube.com/watch?v=eFoAFLHmov4 3 of 5:
http://youtube.com/watch?v=3DK0TjaEQpU Note: I wasn't able to find part 4 which is on the coal companies, or part 5 which is on water.
If you have Adobe flash player you may be able to view them at this site:
http://gristmill.grist.org/story/2007/3/30/165055/133 Commentary of youtuber Chgochef:
Do you know what happens to the debri that is leftover after they blow the tops off? It rolls down the sides of the mountains and into the creeks. The people that live in the valley are on well water. They end up with the toxins in their system which in turn gives them cancer.
I have a two year old cousin that has cancer. The doctors at children's memorial in Chicago think that the cancer is due from the toxins left over from the mountain top drilling.