Environment day 2026 | Results

What happens next? 

If you are one of the winners or part of the winning team, we will definitely be seeing you sometime over the next few weeks. We will also share information about the presentation of the overall prize – a financial donation for a chosen project.

Want to see the correct answers?

Take a look at the correct answers to our environmental quiz. Whether or not you took part in the competition, there is always something new to learn. 

Four of the 32 companies that were part of our pole in 2025 (excluding EnergoBit) account for a significant share of all CO₂ emissions produced across our pole. Can you guess what percentage of the total is generated by these four companies?
A) 37%
B) 49%
C) 62%

Yes, an incredible 62%. That does not mean we should judge these companies too harshly. The volume of emissions naturally depends on the size of the company and the nature of its activities. 

E-mobility is one of the ways we can reduce our carbon footprint quickly and effectively – while also cutting local emissions in the cities where we live. But how well are we doing? Can you guess how many of the 2,272 vehicles in our pole – including vans and trucks – are electric?
A) 72
B) 372
C) 1,372

Did you pick the correct answer? Congratulations, you are one of the few. Most participants chose option B. The reality is indeed rather harsh. It is worth noting, however, that the fleet also includes light commercial vehicles (vans) and trucks. Without them, the share of electric vehicles would be higher. 

Czechia, Poland, Romania. It may surprise you, but each of these countries has a different dominant source of electricity generation. Can you guess which answer is correct?
A) Czechia – nuclear, Poland – coal, Romania – hydropower
B) Czechia – coal, Poland – wind, Romania – nuclear
C) Czechia – nuclear, Poland – wind, Romania – coal

Not a flattering result for Poland. It is important, however, to note that the country’s energy mix has changed significantly over the past eight years, and coal now accounts for only 50% of electricity generation. Czechia and Romania are doing better in this respect, moving away from coal much faster and replacing it with renewable or nuclear energy. 

Our company Omexom Hungary connected the electric vehicle factories of two major global car manufacturers to the grid in Hungary. Can you guess which brands they are?
A) Tesla and Suzuki
B) BYD and BMW
C) Volvo and Land Rover

Since mid-2026, fully electric BMW vehicles have been produced in Debrecen, specifically the revolutionary Neue Klasse iX3. BYD is also starting production at its factory in Szeged. 

KASTT in the Czech Republic develops and manufactures its own rotary heat exchangers, which we supply all over the world. The largest exchanger produced in Hradec Králové has a rotor diameter of 5 metres. In just one hour, enough air passes through it to supply:
A) 3,850 people breathing normally
B) 19,260 people breathing normally
C) 312,500 people breathing normally

A quick look at the KASTT website and a little maths were all it took. The rotary heat exchanger has an airflow of 150,000 m³/h, while an average person at rest breathes about half a cubic metre of air per hour. 

Our VE CEE pole has committed to reducing its CO₂ emissions by 35% between 2018 and 2030. How well do you think we are doing?
A) No problem! We have already reduced emissions by 30%. We’ll beat the target!
B) It will be close. We are two-thirds of the way through the period and have reduced emissions by 17.5%.
C) We’re seriously behind! By 2025, we had achieved a reduction of only 9%.

That’s right! The positive news is that new technologies are helping the pace of progress accelerate. 

The Omexom group of companies in the Czech Republic is one of the leaders in e-mobility within the VE CEE pole. In 2022, less than 2% of all kilometres travelled by company passenger cars were “electric”. Can you guess what share is expected in 2026?
A) 12%
B) 15%
C) 19%

There are 39 electric vehicles in service at Omexom in Czechia. That is more than half of the entire electric vehicle fleet across the VE CEE pole! 

Burning one litre of diesel or petrol releases roughly 2.5 kilograms of CO₂ into the atmosphere. How much CO₂ would you guess is emitted in one month by the Omexom vehicle fleet in the Czech Republic and Slovakia?
A) approximately 12 tonnes
B) approximately 54 tonnes
C) approximately 102 tonnes

This one was very much a guessing question. Across all passenger vehicles, commercial vehicles, trucks and machinery, more than 22,000 litres of fuel pass through the fleet every month. 

Let’s go back in time. One of Europe’s oldest coniferous trees is Baikushev’s Pine. You could easily look up its age online – so let’s make it a little more difficult. Which of these events in Central and Eastern European history could this tree NOT have witnessed?
A) the coronation of Charles IV as Holy Roman Emperor
B) the recognition of Bulgaria by the Byzantine Empire
C) the first Ottoman siege of Vienna

The Byzantine Empire recognised Bulgaria through a peace treaty in 681. Baikushev’s Pine is around 1,300 years old. It is therefore possible that it was already there at the beginning of Bulgarian statehood, although at most as a germinating pine seed. The other events took place much later. 

Solar energy plays an increasingly important role in the energy transition and in reducing CO₂ emissions. Can you guess which business unit has the largest installed photovoltaic capacity within VINCI Energies Romania?
A) TIAB Constanta
B) ELM Electromontaj Cluj
C) Actemium Petrol&Gaze

Actemium Petrol&Gaze came first with approximately 160 kW of installed photovoltaic capacity. The electricity generated helps reduce grid consumption and CO₂ emissions, demonstrating that investment in renewable energy can have a meaningful impact on a company’s everyday operations and activities. 

Energy self-sufficiency is a goal many European cities are working towards, including major cities such as Barcelona and Copenhagen. In Romania, one town has already achieved it. Thanks to its photovoltaic park, its nearly 13,000 inhabitants can meet their electricity needs without relying on electricity from outside the town. Which town is it?
A) Sighetu Marmației
B) Timișoara
C) Ocna Mureș

We admit that this question was slightly exaggerated. Ocna Mureș is self-sufficient, but only at the level of the local administration. In other words, renewable energy powers facilities such as the town hall and public lighting. Residents still use energy from the grid for heating and electricity. 

Find Strážnice on the map of the Czech Republic. It lies around 70 kilometres south-east of Brno and has its own weather station. This year, the station recorded as many tropical days as cities much further south experienced 50 years ago. In terms of tropical days, Strážnice today is comparable to:
A) New Delhi in 1975
B) Valencia in 1975
C) Venice in 1975

Strážnice lies on the edge of a region nicknamed Moravian Tuscany. The name originally referred to its picturesque landscape, but it is now taking on a much more worrying meaning. A place that should have a pleasant Central European climate recorded 54 tropical days with temperatures above 30°C this summer. 

Europe was hit by a heatwave in the summer of 2026, exposing a record number of Europeans to temperatures above 35°C. Can you guess how many people across Europe experienced temperatures exceeding this extreme-heat threshold during the summer?
A) 65 million
B) 185 million
C) 340 million

Estimates range from 135 to 185 million. Either way, it is a worrying figure, especially given that half of the population lives north of the 50th parallel, often used as a reference point for Europe’s temperate climate. 

In 2025, VINCI Energies as a whole generated 270,318 tonnes of CO₂ through its activities. But what does that actually look like? Let’s compare it with the weight of the Eiffel Tower. How many Eiffel Towers of CO₂ does that represent?
A) 7 Eiffel Towers
B) 17 Eiffel Towers
C) 27 Eiffel Towers

Did you know that the Eiffel Tower weighs only around 10,000 tonnes? That may be a more interesting fact than the simple conversion itself! 

Across all VINCI Energies business units, there were 6,379 EV charging points in 2025. Is that a lot or a little? Let’s compare it with the number of public charging points in our countries.
A) VINCI Energies has roughly as many charging points as the whole of the Czech Republic
B) VINCI Energies has roughly as many charging points as Poland
C) VINCI Energies has roughly as many charging points as Romania and Hungary combined

VINCI Energies has roughly as many charging points as Hungary and Romania combined. Impressive, isn’t it? It is also worth noting that Czechia, the smallest of the countries mentioned, has by far the most charging points, more than 7,500. 

Telecom operators use a range of technologies to provide internet access. Which of these is generally considered the most energy-efficient in relation to the amount of data transmitted?
A) Fibre-optic network
B) 3G network
C) Satellite network

That was an easy one! Fibre is the least energy-intensive technology relative to the amount of data transmitted. 

Poland’s largest telecom operators are increasingly using energy from renewable sources to power their networks. T-Mobile Polska reached a significant symbolic milestone some time ago. So, what percentage of the electricity used by T-Mobile Polska comes from renewable sources?
A) 25%
B) 50%
C) 100%

It may surprise you, but T-Mobile in Poland reached this milestone, meaning 100% of its electricity from renewable sources, back in 2021. 

Can you guess in how many countries within our pole new all-time national temperature records were set during the summer of 2026?
A) Five – Czechia, Slovakia, Hungary, Poland and Austria
B) Two – Romania and Bulgaria
C) All of them

A is correct, while B is the exact opposite. Romania and Bulgaria were the only countries where national temperature records were not broken this year. Even in these two southernmost countries, it was very close. Incidentally, Bulgaria holds the highest temperature record of all the countries in the pole, and its 45.2°C record is already 110 years old. The question is therefore how much confidence we can place in it. 

A single-room air-conditioning unit – like the one you might have at home or in a hotel room – typically has a cooling capacity of around 2 kW. But how does a mature tree compare? Provided it has enough water, how much cooling can it provide to its surroundings over the course of a day?
A) 1 kW
B) 7 kW
C) 70 kW

At peak, a mature tree can deliver an astonishing hourly cooling capacity of 7 kW. This figure naturally fluctuates over the course of the day, but the stated 70 kW is realistic. 

When a new asphalt road surface is laid today, it commonly contains 50–60% recycled asphalt. VINCI, however, is one of the pioneers in making even greater use of recycled material. In the Czech Republic, a section of the D4 motorway was opened in December as part of a PPP project by VINCI Concessions, with construction carried out by EUROVIA, part of VINCI Construction. What proportion of recycled material was used in this case?
A) almost 80%
B) almost 90%
C) almost 100%

Although Czechia required 60% recycled material to be used on the D4, VINCI applied its know-how and drivers have now been using the first recycled motorway in Central Europe for almost two years.