“Steel, chemistry and cement cause about three quarters2“For the reason for the decarbonization of this sector, the main attention is mainly paid to the decarbonization of this sector,” the expert on the climate wwf viviane raddatz explains. ” The transition from the fossil to renewable energy sources is the most effective lever for the climate neutral industry. Our study shows: if circulation and CO2-The restoration thought consistently together, a win -win victory is created for our climate, our resources and companies. “
It is especially difficult to make climate production with cement. It also applies to concrete, which is made of cement, among other things. Problem: greenhouse gas is created at various points of the production process. On the one hand, extremely high temperatures are required. This requires a lot of energy, mainly gas or coal, which should be switched to renewable alternatives.
On the other hand, the chemical reaction itself is a problem. To obtain a cement, limestone becomes a cement clinker in a rotary furnace. Limestone crashes into burned lime and carbon dioxide. Therefore, one energy transition is not enough to make a cement climate. Politics and industry want to rely on the fact that it is inevitably created in the process2 Store underground is expensive and less tested. If less than a new cement were required, since the age was processed, the problem would be lower.
So the circular economy can start
The study conducted by WWF studied ten market maturity technologies from the circular economy, which will immediately work in industrial branches, such as steel, chemistry and cement. So this can begin with processing during the building. However, the methods have not yet been used.
The study can also reduce the use of technologies studied to 20 percent, the study can also reduce dependence on energy imports, such as gas from Russia. At the same time, the stability of the industry increases in comparison with fluctuations in raw materials and impaired supply chains.
How can a circular economy go to the construction industry? According to Lea, a doctor, an important lever lies in the requirements for the protection of climate for public tenders. For example, if the school is rebuilt, in the future the climate protection criteria should be taken into account. They included values of greenhouse gases, as well as minimal shares in the used building materials.
At the moment, the distribution of state orders is usually based on the economy. Vranicar criticizes that environmental aspects remain aside. The introduction of the criteria for sustainability of mandatory stability criteria, on the other hand, can help increase the demand for environmentally friendly materials with a targeted and long -term way.
Modular construction methods are also promising. This is the concept of construction, in which standardized components should be read outside the construction site and should be installed only on the spot. Building materials are often used more efficiently, less waste – and, therefore, a lower need, for example, on concrete.
According to the WWF expert, digital removal systems will also contribute to optimizing the recycling processes. This means, for example, invisible digital watermarks or QR codes on the package that can be considered using sensors. Then they contain affordable information about the type of material, use or high -quality functions, and also not only allow more specific sorting, but also an expanded service life for materials.
“Innovation in the stable industry should be in the main interests of the companies and the state themselves,” says Raddatz. “The climate and protection of resources contribute to the stabilization and independence of the sector and can ensure greater cost savings for companies.”
