BusinessGreen: A trial is underway to see if planting fruit and vegetables on the roofs of office blocks could cut companies' energy bills and provide a source of fresh food for their canteens.
The six-month pilot of so-called green roofs got underway last month on four London buildings and is expected to realise savings of between three to 10 per cent on heating and ventilation costs.
If successful, the model could be rolled out to hundreds of other office blocks in the capital.
The roofs of Olswang at...