It is unlikely that Scotland's green energy targets will be reached, research has suggested.

The Telegraph has revealed figures from the University of Strathclyde's Fraser of Allander Institute, which found that the country is set to only produce six or seven per cent of its heat from green power by 2020's arrival.

It was found that just 2.8 per cent of Scotland's heat is developed from renewable sources and, as a result, this figure would have to rise fourfold in order for the objective to be reached.

Commenting on the possibility of meeting the targets, the economists noted: "This scenario appears highly unlikely to be delivered in practice in the current policy and commercial environment."

Elsewhere, prime minister David Cameron recently spoke about the subject of green energy.

Mr Cameron explained that renewable sources need to be financially sustainable in order for the public to benefit from them.

However, he added that the UK has added more capacity to its renewable sector in the past two years than at any juncture in the last decade.