Reedy for take-off..
RAF Kinloss in Moray is going back to nature to provide a solution by using reed beds.
The base, which is home to the RAF's Nimrod fleet, normally drains off surface water from its runway and aircraft bays into Findhorn Bay.
But in winter the water may be polluted by de-icers.
Now the base has installed 12 reed beds which will clean the water before it is pumped underground into Burghead Bay, in the Moray Firth.
Armed Forces Minister Adam Ingram opened the new system yesterday during a visit.