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The 2tonne Challenge is a national program for  higher education students.
His goal ? Allow everyone to engage in their own way in the low-carbon transition and to question the role they will play in it.

*The 2tonne challenge is reserved for students, but 2tonnes is also very useful for staff in educational establishments.
For more information on our offers, do not hesitate to
make a contact request.

After having understood the issues and the need for an urgent action on climate change (via the "la Rentrée Climat" event, for example), allow your students to see themselves forward to 2050 and to experiment in groups with the transformations and decisions needed in the coming decades to meet the climate challenge, thanks to a fun, immersive and personalised workshop based on an innovative teaching approach!  

Why ?

Thanks to programs such as the "la Rentrée Climat"  tens of thousands of students are now educated on climate issues!  Many institutions have managed to take the responsibility for this topic and to internalise the approach.

Le Défi 2tonnes  allows them to go one step further. From understanding the problem to finding real solutions, at the individual, professional and collective levels, during a collective brain storming workshop that is highly complementary to La Fresque du Climat. The internal deployment mechanism of Défi 2tonnes is similar to that of the Rentrée Climat, so that the pedagogical aspects of the two workshops are accompanied by logistical simplicity for the schools.

It is not necessary to offer the Fresque to your students in order to achieve  the 2tonnes workshop.


For who? 


The programme is accessible to all fields of higher education.

  • Any time from September 2021 

  • At any time during the school year, during 1st or 2nd semester.

  • As a "one time" workshop (for a whole class/course) or over several slots during the year.

Are you a student or a teacher? 

Invite your institution to participate in the

"Défi 2tonnes ", share information about it and take part in the coordination and animation activities.

All you have to do is get started!

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The 2tonnes workshop

The "2tonnes workshop" invites participants to explore the future as a team and to try to limit the climate change by reaching the 2tonnes CO2 eq. of greenhouse gas emissions per year and per person, by 2050, in order to respect the Paris Agreement commitments.

To allow a systemic understanding of the issues, the workshop takes into account the individual and collective dimensions of the subject, without forgetting the role of the influence, a key issue in the low-carbon transition.

Aimed at both novices and experts on the subject of climate change, it is also a serious game, designed to bring people together and debate together, so that everyone can have fun and express their opinions. It is based on scientific data from recognised organisations (Ademe, Insee, Negawatt, etc.).

Watch the workshop presentation video 

2 to 3 hours to introduce, play and debate together.


6 to 15 participants per group


1 animator / facilitator 

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Face-to-face or remote

Benefits for your students

Realize the scale of the challenge while visualizing a realistic and progressive low-carbon trajectory

Understand the role of the various public and private stakeholders in the low-carbon transition

Understand the impact of different emission reduction solutions and think about their cost / benefit ratio


2tonnes gives you the option of launching a challenge internally or externally

Create an internal emulation!

Challenge other schools or campuses!

  • Create a friendly internal challenge: which group of students will achieve the best national carbon footprint reduction result in 2050?

  • Add a fun and stimulating aspect to involve students more

  • Maximize the event effect by organizing a reveal of the results at the end of the workshops

  • Which school will achieve the best average reduction throughout the year?

  • Compare your results with other universities !



The workshop summed up in one sentence? They didn't know it was impossible so they did!

"Thank you for this super enriching experience for individuals and for the long term for the company!"                         

"Today everyone is aware that there is a climate crisis but only a few people realise how difficult it is to solve. 2tonnes shows this complexity but also gives concrete ways and tools. The workshop invites students to show leadership on this subject by playing the role of decision-makers and by asking students about their role and ability to act. It also shows the importance of collective choices, in which our students, through their career choices, will have a big role to play.

As the workshop covers 30 years, it allows students to project themselves into their careers."

Christophe Laux, Director of the Leadership and Engineering Professions Department, CentraleSupélec


How it works ?

Coordination of the event by an expert

Training of a team of facilitators (discovery workshop + training in facilitation) 

Opening of a facilitator account on the 2tonnes software (valid for life) for each trained facilitator 

Opening of a user account on the 2tonnes platform and access to all of its features for participating students

Printing game cards.

Supervision of the event on D-Day

All-inclusive rate, HT:

€ 15  per student