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The challengeStudent !

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.

Presentation video of the 2tonnes workshop as part of the Climate Day ofKedge Business School- February 2023

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.

The 2tonne Challenge allows them  to go one step further, moving from understanding the problem to finding concrete solutions, both at the individual, professional and collective level, during a collective intelligence workshop that is very complementary to The Climate Fresco. The internal deployment system of the 2tonne Challenge is similar to that of the Climate Back to School, so that the educational complementarity of the 2 workshopsis accompanied  with logistical simplicity forestablishments.

It is not essential to offer the Fresco to your students to carry out the 2 ton workshop.


For who ?

When ?

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!

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!  

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.).


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

"Training in Ecological Transition in Higher Education must become an integral part of training courses."

"Each student must have  knowledge and skills to act for the Ecological Transition as a citizen and as a professional"

Jean Jouzel report, February 2022

Which individual actions to prioritize?

  • Understanding balances and limits through a systemic approach

  • Seize the orders of magnitude through a prospective analysis

  • Co-construct diagnoses and solutions

  • Use tools to make changes happen

  • Act responsibly

What collective actions to invest in?

  • 8 rounds of action, for reflection on the 4 major sectors

  • Model based on Ademe, INSEE, Negawatt, IPCC data

  • Group construction of a low-carbon transition scenario

  • Visualization of the impact of actions on carbon emissions

  • Reflection at the scale of society and over the long term



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

They did it !

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