Published in 1989, Blueprint for a Green Economy presented, for the first time, practical policy measures for 'greening' modern economies and putting them on a path to sustainable development. This new book, written by two of the Blueprint for a Green Economy authors, revisits and updates its main messages by asking, first, what has been achieved in the past 20 years, and second, what more needs to be done to generate a truly 'green economy' in the 21st century?