The climate impact data used in the exhibition comes from Doconomy, a company that develops digital tools to help us all live in a more sustainable way.

The carbon footprint of the different materials has been calculated as carbon dioxide equivalents (CO2e). The calculations include all greenhouse gas emissions covering a cradle-to-gate perspective, meaning that all emissions from the extraction of raw materials, transport and manufacturing until the material has been produced in the factory are included.

It should be noted that significant variations in emission intensities can exists within the same material group depending on for example manufacturing methods, geography and assumptions made during calculation. In light of this, it is best to view the numbers in the exhibition as giving you an understanding of the relative size of the carbon footprint of different materials - i.e., which materials you get a lot of for 1kg of CO2e, and which ones you get less of. It also means that this is not only about choosing better materials, but also about choosing better suppliers from a sustainability perspective.

Biogenic carbon, that is carbon that is stored in trees and plants as they grow, has not been included in the calculations. It has been excluded since the scope only covers cradle-to-gate emissions, and not the full life cycle. There are also uncertainties about the assumption that biogenic CO2 emissions cause no harm to the climate, which gives us further reason to exclude biogenic carbon from our data sets.