The companies in the Swiss Market Index (SMI) emit an average of 21 million tonnes of CO2 per year. There are huge differences between companies though, as an analysis by the news agency AWP shows.

With 130 million tonnes of CO2, the construction group Holcim is the largest emitter of greenhouse gases in Switzerland's most important share index. The technology group ABB is close behind with around 127 million tonnes. The food company Nestlé is also one of the biggest CO2 emitters with 113 million tonnes. Data from the previous year was taken into account. ...