Recent correspondence on the amount of saved/emitted as a result of the Iceland volcano said a previous writer was in error and claimed a net saving because grounding the aircraft had saved 340 tons of daily while the volcano had only emitted 150 tons daily (Letters, 20 April).
This figure may have been obtained by misreading another newspaper article which said the volcano emitted 15,000 tons daily. That paper has since updated the figure in light of numerous online comments.
The true figure is between 150,000 and 300,000 tons.
Holyrood has voted unanimously to destroy 42 per cent of our -producing electricity generating capacity (as well as 100 per cent of nuclear) over the next 10 years.
Since electricity closely correlates to GNP, this means destroying half our national wealth because "environmentalist" calculations purport to show that last year's barbecue summer and mild winter are harbingers of a warming even more catastrophic than such destruction.
I assume, from the fact that the Scottish media have been broadly supportive of this Climate Change Act, that they have satisfied themselves that, at least over catastrophic global warming, the alarmists' arithmetic is entirely correct.
If there were any doubt our leaders would have to be, unanimously, clinically insane to have legislated such destruction.
Every (volcanic ash) cloud has a silver lining. The recent "no fly" restrictions and decent weather conditions have provided an ideal opportunity for airport authorities to carry out essential and proactive maintenance on their runways. So there should not be, in the foreseeable future, any aircraft delays due to essential runway maintenance.
MICHAEL N CROSBY
I am a bit too young to be a Dunkirk veteran, but if I was I think I might be a bit miffed at some of the media drawing comparisons between that evacuation and the plight of stranded tourists.
Waiting patiently in line, chest- deep in water and under attack by dive bombers, to get a place on some small boat that might get sunk on the way home rather puts the inconvenience and expense of an extended holiday in perspective.