How do actions to decarbonise the energy and mobility sectors affect consumption-based carbon footprints? A case of historic and predicted actions in a suburb in Finland

Household consumption accounts for 72% of the global greenhouse gas (GHG) emissions. To obtain consumption-based emissions in accordance with the 1.5-degree target, the carbon footprint of individuals should be reduced to 2.5 t CO(2)e a(-1) by 2030, which means at least a 70% reduction in high-emitting countries. The decrease in consumption-based GHG emissions can be achieved through both technological and behavioural changes. Currently, climate measures are largely dependent on technological efficiency, although behavioural changes are also needed. In this paper, we study how technological actions to decarbonise the energy and mobility sectors affect consumption-based carbon footprints in the years 2010-2030 in a suburb in Finland. Based on the results, emissions from the mobility sector decreased by 50%, and those from the energy sector decreased by 68% in 2010-2030, when only technology development and society-level actions are considered. These emission reductions affected the carbon footprint of an average Finnish suburb by decreasing it by 37%. This study demonstrates that technological actions to decarbonise the energy and mobility sectors do not guarantee adequate emission reduction by 2030 to achieve the 1.5-degree target; therefore, a change in lifestyle and consumption habits is also needed. Further research should take behavioural changes into account when assessing the development of a consumption-based carbon footprint.