Views: 0 Author: Site Editor Publish Time: 2023-11-15 Origin: Site
Why do buildings matter for clean energy transitions?
Global floor area is growing rapidly, especially in developing countries, and growing wealth means more and more consumers are buying air conditioners and other appliances. Because of the long lifetime of structures, heating and cooling systems, and other appliances, design and purchasing decisions made today will shape energy use for many years to come.
Direct CO2 Emissions From Buildings
Direct CO2 emissions from buildings decreased to 3 Gt in 2022, while indirect CO2 emissions increased to nearly 6.8 Gt
In 2022, direct emissions from buildings operations declined slightly year-on-year, in contrast to the trend over 2015 to 2021 when they grew on average almost 1% per year. At the same time, indirect emissions from buildings operations grew by around 1.4% in 2022, reflecting an increased reliance on electricity.
Emissions trends differed by region. In the European Union, emissions fell in 2022, aided by a mild winter, while in the United States, buildings emissions increased, driven by extreme temperatures. To get on track with the NZE Scenario, emissions must fall by 9% per year on average until 2030, more than halving by the end of the decade.
Beyond the direct and indirect emissions from buildings operations, another 2.5 Gt CO2 in 2022 were associated with buildings construction, including the manufacturing and processing of cement, steel, and aluminium for buildings. Altogether, buildings operations and construction emissions account for more than one-third of global energy-related emissions. Mitigation and adaptation measures are needed across the whole buildings value chain.
Photo by IEA
In 2022, the buildings sector consumed about 1% more energy than the year before
Operational energy use in buildings represents about 30% of global final energy consumption. This share jumps to 34% when including the final energy use associated with the production of cement, steel and aluminium for the construction of buildings.
In 2022, for the second year in a row, space cooling saw the largest increase in demand across all buildings end uses, up by more than 3% compared to 2021. By contrast, space heating energy consumption decreased by 4%, mainly driven by a mild winter in several regions, including Europe.
During the past decade, energy demand in buildings has seen an average annual growth of just over 1%. In 2022 energy demand in buildings increased by nearly 1% compared with 2021. Electricity accounted for about 35% of buildings’ energy use in 2022, up from 30% in 2010. Despite a progressive shift from fossil fuels to other energy sources and vectors – especially electricity and renewables – fossil fuel use in buildings has increased at an average annual growth rate of 0.5% since 2010.
In the NZE Scenario, energy consumption in buildings drops by around 25% and fossil fuel use decreases by more than 40% by 2030. The traditional use of biomass, associated with air pollution and its health consequences, is completely phased out and universal energy access, as delineated in United Nations Sustainable Development Goal 7, is achieved.
Photo by IEA
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