Does a trip by air across the Atlantic have a greater climate impact than eating a steak a day for a year? Does one year’s heating of a house have greater impact than the trip? Players of Climate Call get to learn how the climate is affected by our everyday life. The game is guaranteed to lead to lively discussion and eureka moments! A round can be played in fifteen minutes by two or more players twelve years and older. The estimations of climatic impacts are based on calculations by researchers at Chalmers University of Technology, Sweden.

Rules sheet

Swedish website for Kortspelet Klimatkoll


Climate Call is developed, produced and published by Klimatkoll Guldheden AB.

Idea and project management: Jonas Karlén

Data: Stefan Wirsenius and David Andersson

Events och marketing: Erik Sterner and David Andersson

Design: Tina Damgaard

Illustrations: Hillevi Duus

Text: Lisa Westholm and Erik Sterner


All numbers that we present are based on calculations by Stefan Wirsenius who, except his involvement in Climate Call, is a climate researcher at Chalmers University of Technology. We are about to put together a report about how the calculations have been made, but if you have specific questions, please send an e-mail to hello@climatecallgame.com.


The emissions number on the card “COMMUTE by bus” is a typo. The correct number should be 140 KG.

One of the subtitles on the card “SOLAR PANELS Southwestern US” is wrong. The correct subtitle is “Southwestern US”.


Climate Call is published by Klimatkoll Guldheden AB. Our function is to develop, produce and publish versions of Climate Call and create material and activities connected to the game. The purpose with our effort is to create a learning and fun experience that raises engagement and dialogue about how much everyday activities affects the climate and climate related questions.


The story about Climate Call begins on the address Doktor Bex gata 5 in Guldheden in Gothenburg, 2009. There and then, David Andersson moves in to the football (soccer) coach Jonas Karlén’s flat. David soon gets employment as a PhD student at the Department of Energy and Environment at Chalmers University of Technology, where he begins researching sustainable consumption. David and Jonas become close friends and, among other things, arrange the amateur bar Guldhedens biblioteksbar where Jonas mixes cocktails and David makes hot sandwiches. In addition, David raises Jonas climate awareness by constantly pointing out when he showers too long, forget to turn off the lamp or eat meat for dinner.

– Energy! says David.

– Okay! says Jonas.

In the end of 2016, seven years after David has raised Jonas’s climate conscience that is, Jonas takes the course about games and simulations as tools for learning at University of Gothenburg. At the introduction he gets the idea of ​​a card game where the player places different activities on a line, ordered by the amount of climate impact they have. He tells David about the idea and David loves it! A simple prototype is presented and played at a lunch seminar at the Department of Energy and Environment at Chalmers. Both PhD students and professors become lyrical about the game. Above all, David’s two colleagues Erik Sterner, a passionate ideas man interested in pedagogy and climate physics, and Stefan Wirsenius, world-leading scientist on climate impacts from food and land use, become interested and both get involved in the development of the game. An enhanced prototype is developed and used for a number of study visits for high school students organized by David. The students and their teachers also like the game, and David, Jonas, Erik and Stefan go together to form the company Klimatkoll Guldheden AB, with the purpose of spreading the game to a larger audience.