ISO 14000 series is a set of standards with the aim to assist organizations and companies to build and carry on structured and systematic environmental improvements for continual improvement of its environmental performance. This work covers environmental management, environmental aspects, and environmental indicators and aims to introduce the standards in the ISO 14000 series. It gives an insight of the structure and content of the full ISO 14000 series and explains how the standards in the ISO 14000 series can occur for continual improvement of an organization's or a company's environmental performance.