Focus our energies on renewables

Carolyn Churchill's article (April 25) on power generation had figures only from the nuclear industry. Considerably less favourable independent calculations suggest nuclear's CO2 emissions are comparable to emissions from gas turbines. CO2 savings, if any, will be late on in the lifecycle of a station - not soon, when we need them. It is unhelpful to repeat the intermittent supply argument against renewables, given that Hunterston B has spent six months out of commission for repairs and yet not a day has gone by when Scotland has had no wind, waves, tide or sunlight.