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A Climate-Smart Railway?
Most people are aware that travelling by train is a climate-friendly way to travel. However, the construction and maintenance of railways negatively impact our climate in several ways.
The machines used to build railways and the production of cement for concrete structures result in significant carbon dioxide emissions. Additionally, steel, which is used for rails and concrete reinforcement, is highly energy-intensive to produce.
Since 2016, the Swedish Transport Administration has begun imposing climate requirements on the construction, material selection, and future maintenance of railways. With new technology, they plan to significantly reduce carbon dioxide and other greenhouse gas emissions without major cost increases.
Today, we consider the life cycle perspective in railway construction. By replacing environmentally damaging modes of transportation, future railway investments are expected to offset their climate impact after a few years and be considered climate neutral.
- Even before railway construction begins, climate-smart solutions can be implemented through better planning of tracks, tunnels, and bridges.
- In concrete structures, parts of the cement can sometimes be replaced with blast furnace slag (a by-product of iron production), thereby reducing carbon dioxide emissions.
- In steelwork, climate-smart measures may involve using Nordic and preferably recycled steel.
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