Environmental experts estimate that the upcoming FIFA men’s World Cup, the largest and financially lucrative edition to date, will also be the most-polluting sporting event in international sport. Reporting from Switzerland cites research by the University of Lausanne (Unil) that links the tournament’s wider scale and geography to higher emissions. This summer’s World Cup is expanded to 48 teams for the first time and is staged across three countries for the first time: Mexico, Canada and the United States. Calculations cited by AFP and reproduced by Phys.org estimate CO2 emissions in the range of five to nine million tonnes, compared with about 1.75 million tonnes for the 2024 Paris Olympics. The reporting also contrasts the figures with earlier World Cups, including estimates tied to the 2018 tournament in Russia and the 2022 tournament in Qatar.

A key driver identified is the large distance between venues, which increases air travel for teams, officials and media, and for the more than five million fans FIFA targets. FIFA says it intends to measure, reduce and offset emissions, but it does not provide guarantees following scrutiny over “climate neutrality” claims for 2022. Environmental analysts argue that reducing the scale of mega-events is a more effective approach.