The purpose of the report was to make a situation analysis of environmental work among sports clubs and examine how to implement the ISO-standard and Miljömärkt Event at sports events. There was also a hypothesis that was tested which says that Sustainable Event (ISO20121) and Miljömärkt Event are more suitable for bigger sports events and not smaller but more frequent events. Interviews were made and a questionnaire survey was sent to the sports clubs in the Swedish men's basketball league combined with a case study of match events organized by Umeå BSKT. The questionnaire survey showed that there was environmental work among 64 % of the clubs but mainly in a low grade. Time was the primary reason why environmental work wasn’t prioritized among the clubs who lacked environmental work. The majority considered it important with environmental work within the club. The final conclusions were that it exist environmental work among the sports movement and that Miljömärkt Event and ISO 20121 can be implemented even during smaller and more frequent sports events, but the fact that sport clubs rarely own the facility for their events can be a problem if the owner doesn’t care about the environmental issue.