I have serious technical questions about the sanity of pumping toxic gasses into a subsea cavity, where various chemical reactions will take place, unobserved, unmonitored and uncontrolled.
Add water to carbon dioxide, and what do you get? Carbonic Acid and vast underground caverns.
Add in all the other toxic compounds n the smoke.....
However, let's pose a simple question to all supporters of Carbon Sequestration:
What is the practical difference between pumping gaseous waste from Longannet into holes under the North Sea and putting nuclear waste into holes in the ground?
As far as I am concerned, there is no difference. In both cases you are hiding the problem, not sorting it.
If Longannet is pumping out such a toxic mess, then close the damn place, and end the dependence on dirty coal. Don't leave it for future generations to resolve.