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From construction waste to circular economy: how STRABAG drives green transition

Today, the construction industry is at the crossroads between tradition and transformation. Accounting for approximately 40% of the global energy consumption and for more than 35% of the overall CO₂ emissions, this sector has a huge potential, as well as a responsibility to become one of the key leaders of change in environmental protection. It is this change where STRABAG in Serbia recognises its task and opportunity: through recycling and reuse of materials, solar energy consumption, electric vehicles and digital innovation, the company demonstrates that sustainability can be an integral part of every construction phase.

Acting responsibly, objectively and ethically, STRABAG operates in accordance with the highest integrity standards. Aiming to expand business operations to new areas, they develop innovative and creative approaches within defined frameworks, utilising resources regionally, purposefully and efficiently. Their goal is to become the market leader via automation and adoption of new technologies, while pledging to achieve climate neutrality and CO₂ emission reduction.

Circular economy in practice: second life of materials

Construction waste is no longer and must not be the end of a process, but the start of a new cycle. For instance, concrete that used to end up at a landfill is now treated as a valuable resource: after separating reinforced elements and crushing, the material is reused in construction, as an aggregate for bases, foundations or access roads. This reduces the need for exploiting natural resources, the volume of waste at landfills and CO₂ emissions resulting from transport and production of new materials. The approach confirms that the construction industry can be a generator of a circular economy, rather than just its observer.

By recycling materials, STRABAG enhances processes and rationalises costs, while setting a new benchmark in responsible resource management, thus following its strategic goal of transforming every construction site into a part of a closed, sustainable construction cycle by 2040.

“Our objective is to turn every tonne of waste into a resource in the next project – that is the essence of the circular approach,” STRABAG’s representatives say.

Solar energy and electric mobility: construction sites of the future

In line with STRABAG’s Work On Progress strategy and aiming to become climate neutral by 2040, the company is introducing photovoltaic (PV) panels at its facilities, construction sites and logistics and asphalt bases in Serbia. Solar systems enable a reduction of power consumption from the grid, as well as of CO₂ emissions, thus directly contributing to the company’s global objective.

Green transition also includes the transport segment. STRABAG is modernising its vehicle fleet and introducing e-vehicles and new-generation construction machinery, decreasing its fossil fuel consumption and overall carbon footprint. By combining solar energy sources and electric mobility, construction sites become self-sustainable, with more environmentally responsible and technologically advanced daily operations.

Digital tools – less paper, more efficiency

Not only does digital transformation in STRABAG represent the implementation of new technologies, but it also changes the method of managing each segment of a construction site. By introducing the SSO (Smart Site One) application, the process of planning, monitoring and optimising operations is fully digitalised, from asphalt transport to final installation phases. The app connects people, machinery and processes in real time, thus eliminating downtime, increasing efficiency and reducing fuel consumption and waste.

Furthermore, the company has developed the 5S application (based on the 5S principles – sort, set in order, shine, standardise, sustain), aimed at monitoring order, safety and implementation of the LEAN methods at construction sites. This digital tool enables daily on-site status monitoring, design of automatic reports in order to reduce the risk of injuries, for orderly construction sites with optimal resource use, while additional values: 6S (safety), 7S (team spirit) and 8S (sustainability), facilitate further the culture of safety, team spirit and environmental awareness.

With these applications, STRABAG connects digitalisation and sustainability, showcasing that modern construction can simultaneously be precise, efficient and environmentally responsible.

Journey to climate neutrality

STRABAG in Serbia is implementing an ambitious plan, harmonised with its global ESG strategy and climate neutrality goals. The focus is both on technological innovation and systemic change in the method of construction, use of resources and day-to-day operations.

Key objectives set by the company include the following:

  • 50% of recycled materials in construction processes by 2030
  • CO₂ emission reduction of 42% per project by 2030
  • Fully electric or hybrid vehicle fleet by 2035

Besides technical and infrastructure measures, STRABAG continuously invests in employee education via LEAN and sustainability training courses (training in environmental protection), promoting the principles of sustainable construction, energy efficiency and responsible resource management. As a result, sustainability within the company goes beyond restrictions of individual initiatives, becoming a part of the corporate culture and mindset in every segment of operations.

STRABAG’s sustainability story is more than a series of projects – it is a long-term strategy that changes the future perspective of the construction sector.

“Sustainability is not a trend, but a new foundation of quality. What we are building today must last for the generations to come,” STRABAG’s representatives concluded.

by in News

From construction waste to circular economy: how STRABAG drives green transition

Today, the construction industry is at the crossroads between tradition and transformation. Accounting for approximately 40% of the global energy consumption and for more than 35% of the overall CO₂ emissions, this sector has a huge potential, as well as a responsibility to become one of the key leaders of change in environmental protection. It is this change where STRABAG in Serbia recognises its task and opportunity: through recycling and reuse of materials, solar energy consumption, electric vehicles and digital innovation, the company demonstrates that sustainability can be an integral part of every construction phase.

Acting responsibly, objectively and ethically, STRABAG operates in accordance with the highest integrity standards. Aiming to expand business operations to new areas, they develop innovative and creative approaches within defined frameworks, utilising resources regionally, purposefully and efficiently. Their goal is to become the market leader via automation and adoption of new technologies, while pledging to achieve climate neutrality and CO₂ emission reduction.

Circular economy in practice: second life of materials

Construction waste is no longer and must not be the end of a process, but the start of a new cycle. For instance, concrete that used to end up at a landfill is now treated as a valuable resource: after separating reinforced elements and crushing, the material is reused in construction, as an aggregate for bases, foundations or access roads. This reduces the need for exploiting natural resources, the volume of waste at landfills and CO₂ emissions resulting from transport and production of new materials. The approach confirms that the construction industry can be a generator of a circular economy, rather than just its observer.

By recycling materials, STRABAG enhances processes and rationalises costs, while setting a new benchmark in responsible resource management, thus following its strategic goal of transforming every construction site into a part of a closed, sustainable construction cycle by 2040.

“Our objective is to turn every tonne of waste into a resource in the next project – that is the essence of the circular approach,” STRABAG’s representatives say.

Solar energy and electric mobility: construction sites of the future

In line with STRABAG’s Work On Progress strategy and aiming to become climate neutral by 2040, the company is introducing photovoltaic (PV) panels at its facilities, construction sites and logistics and asphalt bases in Serbia. Solar systems enable a reduction of power consumption from the grid, as well as of CO₂ emissions, thus directly contributing to the company’s global objective.

Green transition also includes the transport segment. STRABAG is modernising its vehicle fleet and introducing e-vehicles and new-generation construction machinery, decreasing its fossil fuel consumption and overall carbon footprint. By combining solar energy sources and electric mobility, construction sites become self-sustainable, with more environmentally responsible and technologically advanced daily operations.

Digital tools – less paper, more efficiency

Not only does digital transformation in STRABAG represent the implementation of new technologies, but it also changes the method of managing each segment of a construction site. By introducing the SSO (Smart Site One) application, the process of planning, monitoring and optimising operations is fully digitalised, from asphalt transport to final installation phases. The app connects people, machinery and processes in real time, thus eliminating downtime, increasing efficiency and reducing fuel consumption and waste.

Furthermore, the company has developed the 5S application (based on the 5S principles – sort, set in order, shine, standardise, sustain), aimed at monitoring order, safety and implementation of the LEAN methods at construction sites. This digital tool enables daily on-site status monitoring, design of automatic reports in order to reduce the risk of injuries, for orderly construction sites with optimal resource use, while additional values: 6S (safety), 7S (team spirit) and 8S (sustainability), facilitate further the culture of safety, team spirit and environmental awareness.

With these applications, STRABAG connects digitalisation and sustainability, showcasing that modern construction can simultaneously be precise, efficient and environmentally responsible.

Journey to climate neutrality

STRABAG in Serbia is implementing an ambitious plan, harmonised with its global ESG strategy and climate neutrality goals. The focus is both on technological innovation and systemic change in the method of construction, use of resources and day-to-day operations.

Key objectives set by the company include the following:

  • 50% of recycled materials in construction processes by 2030
  • CO₂ emission reduction of 42% per project by 2030
  • Fully electric or hybrid vehicle fleet by 2035

Besides technical and infrastructure measures, STRABAG continuously invests in employee education via LEAN and sustainability training courses (training in environmental protection), promoting the principles of sustainable construction, energy efficiency and responsible resource management. As a result, sustainability within the company goes beyond restrictions of individual initiatives, becoming a part of the corporate culture and mindset in every segment of operations.

STRABAG’s sustainability story is more than a series of projects – it is a long-term strategy that changes the future perspective of the construction sector.

“Sustainability is not a trend, but a new foundation of quality. What we are building today must last for the generations to come,” STRABAG’s representatives concluded.

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Cement maker Holcim gets EU grant for carbon capture project in Romania

A carbon capture and storage (CCS) project developed by cement maker Holcim Romania has been awarded financing under the European Union’s Innovation Fund. The European Commission has selected 61 cutting-edge net-zero technology projects across the EU to receive a total of EUR 2.9 billion in funding, covering sectors such as oil refining, hydrogen, transportation, chemicals, iron and steel, and the manufacture of components for renewable energy plants and batteries.

Holcim’s project at its plant in Câmpulung, Argeș county, involves capturing CO2 from cement and lime production and storing it underground. The first large-scale onshore CCS project of its kind in Eastern Europe is expected to produce an estimated two million tons of near-zero cement annually from 2032, according to a press release from Holcim.

The project will enable Holcim Romania to produce two million tons of near-zero cement annually

Carbon Hub CPT 01 will use proven carbon capture technology to separate CO2 from flue gases, which will then be compressed and transported for permanent, safe storage underground, the company said.

The Switzerland-based cement producer now has eight large-scale EU-supported carbon capture projects – in Germany, Poland, Belgium, France, Croatia, Greece, and Romania, according to the press release.

Decarbonizing energy-intensive industries across the EU

The European Commission said that the EUR 2.9 billion in grants follow its first call for net-zero technologies (IF24 Call), launched in December 2024, aiming to strengthen the EU’s technological leadership and accelerate the deployment of innovative decarbonization solutions.

The selected projects span 19 industrial sectors in 18 countries, focusing on energy-intensive industries, renewable energy and energy storage, net-zero mobility and buildings, cleantech manufacturing, and industrial carbon management.

The largest number of selected projects is in the cement and oil refining sectors

The largest number of awarded projects is in the refineries sector, with 11, followed by 10 in the cement and lime sector, 6 in the manufacturing of components for renewable energy, and 4 in the manufacturing of components for energy storage.

Other sectors on the list include chemicals, solar, maritime, road transportation, aviation, non-ferrous metals, hydrogen, buildings, construction materials, geothermal energy, and the manufacturing of components for energy-intensive industries.

The 61 selected projects have the potential to cut some 221 million tons of CO2 equivalent over their first decade of operation, supporting the EU’s objective of achieving climate neutrality by 2050, according to a press release from the European Commission.

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Energy Community’s CBAM Readiness Tracker: Western Balkans still far from exemption as full implementation nears

With less than three months remaining until the European Union’s Carbon Border Adjustment Mechanism (CBAM) is fully implemented, none of the Energy Community’s contracting parties has yet qualified for an exemption in the electricity segment, according to the 2025 CBAM Readiness Tracker. However, the Energy Community’s report suggests that efforts to meet the are gaining momentum, with Serbia, Moldova, North Macedonia, and Montenegro leading the way to market coupling with the EU, and almost all contracting parties planning to introduce carbon pricing.

These efforts signal a growing readiness across the Energy Community to turn CBAM into a catalyst for deeper regional energy market integration and decarbonization, according to the annual report.

“The progress reflected in this year’s tracker underlines that CBAM can drive – not deter – regional cooperation on the energy transition,” Energy Community Secretariat Director Artur Lorkowski stressed and added that the scheme should “serve as a bridge into the EU, not a barrier.”

Lorkowski: CBAM should serve as a bridge into the EU

Starting on January 1, 2026, the EU will charge fees on the CO2 emissions of goods imported from countries that don’t apply matching carbon pricing schemes. In addition to electricity, the carbon border tax will cover cement, iron and steel, aluminum, fertilizers, and hydrogen.

Serbia faces the highest exposure to CBAM costs

Estimates based on 2024 data show the CBAM exposure of EU electricity importers could reach around EUR 1.17 billion a year. Serbia accounts for the largest share, with an estimated EUR 612.5 million in annual CBAM costs, followed by North Macedonia, with about EUR 200 million, Montenegro, EUR 190 million, and Bosnia and Herzegovina, EUR 158 million. Moldova’s exposure is about EUR 6 million, while Albania, which has an electricity mix almost entirely dominated by renewables, faces no CBAM-related costs, according to the report.

The estimated average CBAM cost per megawatt-hour is EUR 33.14 for Moldova, EUR 59.71 for North Macedonia, EUR 62.45 for Montenegro, EUR 66.71 for Serbia, and EUR 73.37 for Bosnia and Herzegovina.

The criteria for a CBAM exemption for electricity include integrating the power market with the EU and introducing a carbon pricing system. A contracting party must also adopt EU regulations on energy, electricity, environment, and competition, increase the share of renewables in its energy mix to align with the EU’s 2030 targets, commit to climate neutrality by 2050 and submit a related roadmap to the EU, and implement measures to prevent indirect electricity imports from non-compliant countries.

Advances evident in emissions, renewables, and market coupling

The 2025 CBAM Readiness Tracker shows that last year alone, carbon intensity across the contracting parties’ power sectors fell by an average of 11%. At the same time, capacity from renewables, excluding large hydro, surged to 5.1 GW from 2 GW between 2020 and 2024. The expansion was driven almost entirely by solar and wind, helped by renewable energy auctions.

When it comes to electricity market integration, no contracting party has completed market coupling with the EU. However, Serbia, Moldova, North Macedonia, and Montenegro are approaching a “point of no return,” which represents a full transposition of EU regulations relevant for market coupling, according to the tracker.

The energy transition unfolding across the Energy Community contracting parties is both tangible and measurable, Adam Cwetsch, Head of the Green Deal Unit at the Energy Community Secretariat, told Balkan Green Energy News. “Carbon intensity in electricity production and economic output continues to fall, while renewable energy deployment accelerates through competitive auctions. This progress reflects a clear commitment to European decarbonisation goals and lays the foundation for deeper energy market integration and long-term climate neutrality,” he stressed.

The secretariat remains committed to ensuring the process continues smoothly – without obstacles from possible unintended impacts of CBAM, Cwetsch said.

Even though no contracting party has introduced a carbon pricing instrument for electricity, almost all of them have outlined plans to establish domestic systems that reflect their specific circumstances.

“This is a crucial step toward alignment with the EU’s carbon pricing framework under CBAM. The rollout of monitoring, reporting, and verification systems across the region is laying the groundwork for implementation and demonstrates growing readiness and credibility, even as timelines remain tight and challenges persist,” Cwetsch stated.

Available carbon pricing models are carbon taxes, ETS and a combination of the two

The available models are a carbon tax, an emissions trading system (ETS), and a hybrid version. The only contracting party that has no plans to introduce carbon pricing is Kosovo*, according to the report.

All contracting parties have concluded agreements to apply EU law in the fields of energy, electricity (including renewable energy), the environment, and competition. In each of them, the implementation of renewable energy legislation is either underway or showing visible progress, the report shows.

No Western Balkan country has included the EU’s 2050 climate goals into national legislation

On the other hand, Ukraine and Moldova are the only ones that have included the 2050 climate neutrality objective in national legislation, while no contracting party has submitted a corresponding roadmap to the EU.

Another requirement that no one has yet fulfilled is the establishment of an effective system to prevent indirect import of electricity into the EU from other third countries or territories that do not meet the CBAM exemption criteria for electricity.

* This designation is without prejudice to positions onstatus and is in line with UNSCR 1244/99 and the ICJ Opinion on the Kosovo declaration of independence.
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Zagreb on track to reach almost 20 MW of solar on public buildings

Zagreb operates solar power plants with a total capacity of 2.43 MW on public buildings, and an additional 16 MW is set to be installed on roofs, according to Mayor Tomislav Tomašević.

In 2021, the capital city of Croatia presented the Sunny Roofs program for the installation of photovoltaic plants with a combined capacity of 50 MW. Implementation began three years ago with the Solarization of Institutions of the City of Zagreb (SOLIZAG) project.

It was worth EUR 1,1 million. Within SOLIZAG, power plants were installed on eight city buildings – swimming pools Utrina, Svetice, and Jelkovec, kindergarten Trnsko, psychiatric hospital Sv. Ivan, homes for the elderly Trešnjevka 1 and 2 and waste management utility Čistoća. They have a total capacity of 1.6 MW.

The city currently has 2.43 MW of solar power plants in operation on public buildings

“In total, we currently have 2.43 MW of solar power plants in operation on public buildings owned by the City of Zagreb. It is three times the capacity we found in June 2021, only 0.7 MW,” Tomašević stated.

Currently, a total of 16 MW of solar power plants on city-owned buildings have been contracted or are in the process of being contracted. A firm has been selected for the design and construction of 10 MW of solar panels on approximately 200 city buildings, with implementation set to begin this year.

The mayor describes it as the largest investment in the solarization of public buildings in Zagreb’s history. In his view, it is a key step toward the goal of a more energy self-sufficient city.

Residents of Zagreb have a digital platform for assessing the solar potential of their roofs

In addition to the investments, commercial projects are being developed through the company Zagrebački Sunčani Krovovi. The PVMax project, supported by the North-West Croatia Regional Energy Agency (REGEA), is also underway for 41 MW in total on company buildings. So far, 6 MW has been installed.

Residents of Zagreb can assess the solar potential of their roof on a digital platform. It also calculates the cost-effectiveness.

Croatia’s capital is also participating in the Climate City Contract, which unites 100 cities committed to achieving climate neutrality by 2030. As part of the initiative, Zagreb is preparing a climate neutrality plan, expecting to adopt it this year.

Marking Earth Day, Mayor Tomašević visited one of the PV plants built within the SOLIZAG project, at the Svetice swimming pool complex. He was accompanied by his deputies Danijela Dolenec and Luka Korlaet.

Photo: City of Zagreb