On 28 May, the European Sea Ports Organisation (ESPO) presented the key components of its forthcoming Green Guide 2021 during the ESPO Conference Regatta 2021. The ESPO Green Guide 2021, a Manual for European Ports Towards a Green Future has now been published. / The ESPO Green Guide 2021 provides Europe’s ports with tools and concrete guidance for greening, and comes as a response to the main environmental challenges currently facing the port sector with climate change being by far the most urgent. The Guide is a bottom-up initiative from the port sector. It provides a vision for ports in a green future, and steps up the ambition of ports in response to raised climate and environmental targets on the European level. (....)