The latest version of ISO 14001, ISO 14001:2015 has brought changes to the most widely used standard on Environmental Management Systems (EMS). One of the major changes is its structure. ISO 14001:2015 now has the high-level structure that is now common to all ISO management system standards referred to as Annex SL. This new common structure brings a more strategic focus to the standard and facilitates the integration with other ISO management system standards. In addition to this new structure, there are many differences between ISO 14001:2015 and ISO 14001:2004. Here we will briefly explain the most relevant ones.