The main points from this module are as follows:

An Environmental Management System (EMS) is a collaborative and systematic approach, to effectively managing environmental risks. 
There have been two previous editions of ISO 14001, before ISO 14001:2015. These are: ISO 14001:2004 and ISO 14001:1996.
One of the best known environmental management systems other than ISO 14001 is EMAS. EMAS is an acronym for Eco-Management and Audit Scheme. 
ISO 14001:1996 is the first edition of ISO 14001 and is compatible with ISO 9001:1994. It offers requirements for an environmental management system, to help an organization to develop a policy and objectives taking into account legislative requirements and information about significant environmental impacts.
The primary difference between ISO 14001:2004 and ISO 14001:2015 is that ISO 14001:2015 focuses on the interface of an organization with its business environment, and ISO 14001:2004 concentrates on managing environmental impacts and other internal issues. 
The committee responsible for the revision of ISO 14001 is known as ISO/TC 207/SC 1. ISO 14001:2015 was first published on 15 September 2015.
ISO 14001:2015 incorporates the Plan-Do-Check-Act (PDCA) model. This offers a mechanism for organizations to plan what they require, to mitigate the probability of incidental environmental damage.