In December 2009 the Copenhagen climate summit meets to agree targets for worldwide cuts in carbon emissions. BBC Scotland looks at how changing the way we generate electricity could end up creating huge profits. Scotland is a wet and windy country; its moors, hills and shores have the best potential for generating renewable electricity in the whole of the European Union. Business correspondent Hayley Millar discovers how, more than 30 years after oil and gas started coming ashore here, the fight to clean up the planet could create a second energy boom for Scotland.