There's really nothing new in the information above but it seems to me that 'everyone'
has been talking about it for too long and although some small replacements have been made there is still too much talk and too little action to deal with the problem. So now that these alternative sources of energy have been identified they need to be subject to indepth feasibility studies as it seems that if this does not happen they will always carry the 'alternative' tag and never become the new Green replacement. The trouble with that is - the clock's ticking ..