The north exit of Lerwick could have another large wind turbine among its landscape as a local company looks to go even greener.Planning permission has been granted for a 900kW turbine at North Hoo Fields to provide additional power to a nearby biomass facility at Gremista Industrial Estate which turns wood into energy.North Fish (Shetland) Ltd already has a 67m tip height turbine in the area, to the left of the three-lane road when driving north out of Lerwick, for the same purpose.The new turbine will be on a taller tower, reaching an overall tip height of 77m, to achieve consistency with the first one, as it will be built on lower ground.North Fish director Angus Grains said the new turbine would support future growth in the business, which supplies heat and electricity from renewable sources to commercial customers.It supplies wood pellets for biomass boilers in Shetland, while the company also provides energy to the Lerwick District Heating System.