Guardian: Europe’s largest windfarm is to be built alongside the M74 in south-west Scotland after Scottish ministers approved plans to erect more than 150 turbines on surrounding moors. The £600m project is likely to produce enough electricity to power more than 250,000 homes by the time it is completed in 2011, and is well over twice the size of Europe’s largest existing windfarm, at Guadalajara in Spain. The approval was announced yesterday by Alex Salmond, Scotland’s first minister, at a …