Stockholms Energiframtid : En backcastingstudie för ett fossilbränslefritt Stockholms län 2050

Sammanfattning: This study concerns the energy future of the county of Stockholm up until 2050 and describes how the energy consumption can be compared to today with the use of scenario methodology. Within energy future studies the backcasting approach is well known and has been put to use in this study. Due to the characteristics of backcasting the study is self-fulfilling, i.e. the future energy scenarios presented in this study satisfy the targets set up in this study. In the light of what may be the largest challenge of our time – the climate change - the aim of this study is to describe how the energy consumption in a fossil fuel free Stockholm county in the year of 2050 may be. The need to reduce the carbon emission to the atmosphere is extensive and of immediate urgency. One part of reducing carbon emission is to relinquish the fossil energy use which is attained either by reducing the energy consumption or switching to renewable energy use or a combination of both of these measures. The scenarios also describe the energy use per capita as well as carbon emissions per capita (due to energy use) besides being fossil fuel free. The energy use and carbon emission per capita is related to what is known as fair share of environmental space which may indicate if the per capita levels deduced in this study is consistent with a sustainable society. Several measures and their potential (to decrease the energy use or shifting into renewable energy fuels) are presented. The scope of measures reaches for example from energy efficiency to new infrastructure but also to reducing measures that reduce the need for example travels. The measures presented in the study are a reality today or will be in the near future, so the study takes on a non-technology optimistic approach. Several of the measures are combined into two different energy-futures for the year 2050 and their energy use is comparedto a business-as-usual-scenario. The business-as-usual-scenario describes the level of energy use in the County of Stockholm if no active measures are taken to reduce the energy use. The scenarios are presented with two different possible alternatives for the economic and population growth, i.e. alternative BAS (eng; base) and HÖG (eng; high). The study with its (only) two different future scenarios is not exhausting thepossible fossil fuel free futures of Stockholm County. Neither the measures nor the energy-futures have been evaluated from an economic or any other perspective. This means the study leave out whether the measures or the energy futures are feasible from an economic perspective or even desirable. The study also leaves out other perspectives like other environmental effects, health issues,equality, aesthetic etc. The aim of presenting different energy-futures of a fossil fuel free Stockholm county is to encourage, simulate stakeholders, policymakers and community citizens to further take an active interest and to start making the changes needed that leads to a fossil fuel free community. The energy-futures but also a few of the measures shows that the future energy use in Stockholm county in the year 2050 may decrease substantially compared 2003. As a result of this the need for renewable energy fuels (for replacing theuse of fossil energy fuels) is reduced. If Stockholm county may take an 10 % part of the bio energy that the whole of Sweden can produce in the future the fossil fuel free energy-futures presented in this study is secured. The energy-futures also shows that the energy use per capita may reach a sustainable level and also that the carbon emission per capita reaches a level far below the suggested level expressed by the Swedish government of 4,5 ton CO2 per capita. One step in the backcasting approach has been left out in this study, i.e. the path to the presented energy-futures. The reason for this is that it needs further analysis of the energy-futures from several other perspectives. As well as analysis over decision making processes, planning processes and different stakeholders involved. However the presented energy-futures may in some cases indicate what type of measures and decisions that needs to be taken and what kind of investments that are needed. Finally, the future is still yet unknown and the energy-futures presented in this study are in the long-time perspective which further increases the uncertainty ofthe scenarios because of uncertainty in collected data, calculations and assumptions made. On the other hand the aim of the study is not to present the most probable energy future but energy futures that fulfil the target of a fossil fuel free Stockholm county in the year 2050.