A recent study on the historic development of energy consumption in the Norwegian dwelling stock (Sandberg et al. 2011), based on the building stock model developed in the work of Bergsdal and colleagues (2007), showed that direct energy consumption doubled between 1960 and 1995 and has remained rather constant at about 45 terawatt-hours per year (TWh/yr) since. Using the Norwegian electricity mix, Sandberg and colleagues (2011) found a significant decrease of the sectoral carbon footprint of about 40% mainly due to the phasing out of oil and coal as heating fuels.
Evidence to claim 1