Extensive technological developments, a ban on fossil fuels, less construction, fewer flights, fewer car journeys and lower levels of beef and dairy consumption. Only by taking all these measures in combination can Sweden get closer to emission levels in line with the Paris Agreement, according to a new research report commissioned by the Swedish Parliament. Credit: Chalmers University of Technology
Extensive technological developments, a ban on fossil fuels, less construction, fewer flights, fewer car journeys and lower levels of beef and dairy consumption. Only by taking all these measures in combination can Sweden get closer to emission levels in line with the Paris Agreement, according to a new research report commissioned by the Swedish Parliament.
On April 7, the Swedish Cross-Party Committee on Environmental Objectives is suggesting a new consumption-based climate target, as a complement to the existing territorial climate targets. As a basis for this, a group of Swedish researchers, from organizations including Chalmers University of Technology, have produced a comprehensive report analyzing how consumption patterns need to change for Sweden to reach emission levels in line with the Paris Agreement’s goal of keeping the global temperature rise well below two degrees Celsius.
The researchers’ conclusion is that while extensive technological developments are essential, consumption habits must also change—only by combining these two approaches do we stand a chance of achieving the goals of the Paris Agreement. The premise in the calculations is that the remaining future emissions are distributed globally evenly per person.
“If we are to achieve really low emission levels, we need to both invest heavily in new climate-smart technologies, as well as make significant changes to our behavior when it comes to the goods and services with the highest carbon footprints,” says Jörgen Larsson, Associate Professor in sustainable consumption at Chalmers University of Technology, and project manager for the report.
Without behavioral changes, emissions will remain high
The report is based on analyses of different scenarios and shows that if we rely only on technological developments—measures such as eliminating fossil-fuel vehicles, producing fossil-free steel and fossil-free commercial fertilizer—emissions will still be too high. Only when these technological developments are combined with significant changes in behavior does the outlook improve—particularly if the changes are substantial.
When combined with fewer flights, less car travel, significantly reduced consumption of beef and dairy products, and radically reduced construction of roads and housing—for example by converting office blocks to residential buildings—emissions could sink by up to 90 percent by 2050, compared with today’s level. This reduction of emissions is based on the assumption that the rest of the world also enacts climate change mitigation measures to meet the goals of the Paris Agreement, thereby reducing the carbon footprints of imported goods.
“The scenario with extensive behavioral changes is a theoretical thought experiment, which aims to show the lowest levels we could reach with the help of both technological and radical social changes and still live a modern life,” says Johannes Morfeldt, researcher at the Division of Physical Resource Theory at Chalmers University of Technology.
The figure shows the emission levels and reduction potentials for different scenarios in 2050 compared to 2019 for emissions related to transportation, food, buildings and infrastructure. Current trends and policies shows the results for Swedish consumption-based emissions if other countries develop in line with current climate policy. Global climate transition shows results for Swedish consumption-based emissions if other countries develop in line with the goals of the Paris Agreement. Credit: Chalmers University of Technology / Johannes Morfeldt
Analyses based on five distinct scenarios
The report, which is based on Swedish conditions, outlines scenarios with varying degrees of technological development and behavioral changes.
- The Reference scenario foresees behaviors and technology evolving according to current trends.
- The Territorial climate target scenario—Sweden’s climate targets are achieved mainly through technological changes.
- Behavior and technology scenario—in addition to the technological changes in the previous scenario, further measures are implemented (both technical and behavioral) to lower Swedish consumption impacts outside of Sweden’s borders as well. (not pictured in the diagram)
- Comprehensive behavior and technology scenario—extensive reductions in flying, driving, consumption of beef and dairy products, as well as in the construction of new roads and housing.
- Reference scenario with comprehensive behavior change—the same reductions in consumption as in the previous scenario, but without the introduction of advanced technologies, both in Sweden and abroad.
More about the research
This study outlines a method for scenario analysis based on bottom-up simulations of pathways for consumption sectors with the largest climate impact—passenger car travel, air travel, construction and housing, and food. The study extends previous research by analyzing the impact of lifestyle and technological changes at the national level on consumption-based emissions. The analysis merges methods developed in separate sectoral studies and places them in a prospective lifecycle assessment framework. Assumptions are harmonized for two background scenarios—a current trends and policies scenario and a global climate transition scenario in line with the Paris Agreement’s goals—to illustrate the strong influence of technological developments in the rest of the world when estimating consumption-based emissions (indicated by a range).
Nature-based carbon removal can help protect us from a warming planet More information: Report: research.chalmers.se/publication/529052 Provided by Chalmers University of Technology
Citation: To save the climate, a combination of technological and behavioral changes is essential (2022, April 7) retrieved 28 April 2022 from https://phys.org/news/2022-04-climate-combination-technological-behavioral-essential.html
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