More than one in four of Prince William's rental properties are amongst the worst rated for CO2 emissions, a Mirror investigation has found. Yesterday, a joint investigation with Channel 4 Dispatches showed that one in seven Duchy of Cornwall properties have the worst F and G ratings for energy efficiency , leaving tenants at risk of fuel poverty and living in cold, damp and mouldy homes. We can now reveal the huge amounts of carbon produced by the Prince’s least environmentally-friendly rental