KliNa Tag 2025: Just Do It Green

How can the construction industry make its contribution to achieve the climate goals specified at the national and EU level? This question was at the center of the Fourth clina daythe one FCP.VCE organized on September 3, 2025 in the Tuthesky of the Vienna University of Technology. Around 150 Expert: Interior from construction, civil technology, architecture, environment and science Discussed strategies, opportunities and obstacles for a climate -neutral future.

Fact situation: Austria’s climate goals in an international comparison

„In order for Austria to become climate neutral by 2040, they must Emissions drop by 8 % annually. That is feasible with Investments of 6.4 billion to 11.2 billion euros per year – also 1.3 to 2.4 % of GDP,“ so Univ.prof. Sigrid Stagl (Wu Vienna) in her keynote, in which she showed the relationships of economic and ecological opportunities and risks based on scientific knowledge. Because one thing is clear: 6 of the 9 planetary borders have already been exceeded and that with serious consequences for all areas of life. And if you think, climate protection and sustainability is too expensive, you are wrong. In the long term, climate protection and sustainability pay off.

But where should the funds for these investments come from? The scientist of 2024 also A solution: “Climate protection only works if we not only make new greener, but also stop doing the wrong one“, The economist referred to savings potential through the Abolition of climate control -productive grants of around 5 billion euros. Additional sources of income from financial transaction tax or stock market sales tax of around EUR 1-4.5 billion, wealth tax of EUR 4 billion or inheritance tax of EUR 1 billion could also be used for this.

How does it fail in Austria? Stagl called Denmark as a modelwhere a Whole-of-Government-Ansatz Climate protection anchored in all departments. Austria had been a straggler for a long time, but had the aim of 2040 Adäquate’s level of ambition reached that the following is now going on.

Innovations in construction: from recycling to digitization

Impressive practical examples showed how climate protection in construction and industry can look concrete:

• Resource return: Johannes Czeczil (BALSA) reported on the renovation of the aluminum slag endpile in Lower Austria. “”The primary extraction of aluminum is extremely energy -intensive, the opposite is the return that around the Factor 1:10 Leger less than the new acquisition is. We save 11 tons of CO₂ per tonne granulate. Until the end of the project they add up Savings on around 4 per thousand of Austrian CO₂ emissions.“

• Existed before new building: Experts warned not to carry out renovations schematically. “”A 30-year building can be structurally intact that interventions make it ecologically and economically little. We need individual reviews, otherwise we will be refused at the destination“Such a summary from practice.

• Foresight planning: „We are responsible for building buildings in 50, 100 or 200 years. The fact that we do not plan gray water use today, although we know that it will be necessary in 20 years, is a missed chance,“ emphasized Caroline Palfy (Orbyz).

• Digitization as a key: „For me, digitization is the basis for sustainability. In the circular economy, a well-kept BIM model creates the basis for generations,“According to Palfy. At the same time, warned Minor doctor Michael Jungwirth Before the consequences of the careless AI use: „The documents we receive as official doctors and experts have not necessarily gained quality in recent years due to the use of AI.“

Common responsibility in construction

In the final panel discussion of the certified eco -event plus everyone agreed: only if ecological, social and economic aspects To be considered, the transformation can succeed.

“We have to have the courage to consistently apply existing solutions – and at the same time decide new ways,” was the common conclusion.