3. Material and methods
The many different policy sectors and systems which are involved in the biogas development process in Stockholm make this case interesting for the study of possible policy Temsirolimus processes. In addition, the characteristics of biogas as an object which may be both concrete and abstract and which occurs within several systems, makes it a possible case of a boundary object. Therefore, the case of biogas development in Stockholm provides an exploration of the role that boundary objects may play for policy integration processes.