The average cost of a roof mounted wind turbine is around Â£2,000 which will also need to be maintained (The Energy Savings Trust estimate that this could cost Â£100 to Â£200 per year). Find our list of roof mounted turbine manufacturers here.
You can substitute vegetable oil, cup for cup, for shortening. Using oil versus shortening will change the texture of baked goods. The shortening, being a solid fat, will add more air to the batter when beaten in, giving the end product more of a cakey structure rather than the more dense structure oil will give. Ultimate Baking Secrets Revealed.
Shortening (margarine or butter or oil) 1/3 Cup Water Use a fork or pastry cutter to mix the dry ingredients first; flour, baking powder and salt. Add in shortening and water. If you are using butter the pastry cutter will help you cut in or mash the cold butter into little tiny bits of flavor.