The 2026 FIFA World Cup is expected to be the biggest tournament in FIFA history—with 48 teams playing 104 matches in 16 cities across North America. Yet as FIFA moves to make the event bigger and better, according to a new report one thing may have been swept to the sidelines: sustainability .  An independent assessment published by the global carbon accounting platform Greenly estimates that the 2026 FIFA World Cup could generate 7.8 million metric tons of carbon dioxide —more than double the official reported emissions for the 2022 FIFA world cup in Qatar and equivalent to that of Sierra Leone .  “The bigger an event, the more people attend, the more that fly to the different venues, the higher it emits,” says Alexis Normand, co-founder of Greenly.…