The UN Conference on Environment and Development (UNCED) was the product of a long preparatory history and was unique in its size, scope, level of participation, and process. Most governments submitted reports to the conference on their environment and development outlook, and many established national consultative committees and processes. There was unprecedented involvement from non-governmental groups, and countless national and international conferences on UNCED themes. The UNCED process acted as a catalyst and focus for injecting concepts of sustainable development around the world.