Herald: The news yesterday that rocketing gas prices threaten to force families into paying £1000 a year for heating and electricity will doubtless help to focus the minds of ordinary Scots on how to find cheaper energy sources. They are not alone. The combination of sky-high costs, the need to combat global warming and growing concerns that fossil fuels are running out have been a serious issue for the SNP since it took power last year. Although Scotland’s oil is still an asset the …