Event greening refers to making socially and environmentally responsible decisions when organizing or participating in an event. It involves incorporating sustainable development principles into all levels of event organization and aims to ensure that an event is hosted responsibly.

The vision of event greening is to reduce the consumption of resources, avoid damage to the local and global environment, protect biodiversity and human health, take ecological, social and economic aspects into account for future orientated city development and offer sustainable development options to the local people and economy.