The indoor and outdoor environments create the conditions to which we must adapt. Issues concerning energy are important in our efforts to create healthy environments around us; i.e. a suitable climate and good air quality. It is important to study and evaluate the consequences of changes in climate on humans, both indoors and outdoors. Even small changes in temperature or air quality can affect our well-being, performance and health. It is also important to study the relations between climate and air quality on the one hand, and performance and productivity on the other.