A new study has put Auckland at the top of the world for the speed at which it’s going green, Stuff reports. But for a so-called green city, Auckland’s plastic waste was nearly through the roof at 177,314 tonnes per year, especially when compared to the Swedish capital’s waste of just 26,996 tonnes. Auckland was also revealed as having the lowest air pollution score of all the top 10 cities analysed, with an air quality score of just 9 (0-50 is considered good, 150+ not good).