1 kWh= 36·105 Joules; 1 1 litre of diesel = 37·106 Joules; 1 1 litre gasoline= 34·106 ,1 l de gasóleo= 37·106 Joules Measures implemented in 2011 in the construction of four buildings (Cártama, Mesón, Casaquemada and Zamora) u Electricity: Control system that allows lighting systems to be adjusted to the real occupation of the area, as well as a control system that optimises the use of natural light.