Described by the organizers as the biggest demonstration of international support for the health of the global environment since UNCED, the Clean up the World campaign, which took place in September 1992, received support from 90 cities all over the world. The project had development funding from UNEP and the U.S.-based EGBAR Foundation. Clean up the World was developed, coordinated and promoted by Clean Up Australia, a community-based environmental organization, in conjunction with UNEP. The campaign was designed to focus attention on the need for local action in dealing with environmental problems. The second Clean Up the World campaign was held during the weekend of September 16 to 18, 1993. Clean Up the World could become the world's largest community event.

Developing an alternative public transport plan was the focus of the LinkUp Conference held in Sydney, Australia in August 1993. The conference, attended by over 200 transport, environmental and community welfare activists, examined the draft of an alternative transport plan. Recognizing that motor vehicles constitute the single biggest source of atmospheric pollution, the LinkUp plan stresses that to become ecologically sustainable, Sydney's transport system must reduce emissions of global warming gasses and ozone depleters, use energy efficiently and use resources and land wisely with minimum impact on urban bushland, vegetation, air and water resources.

The Sierra Club has hired an African-American civil rights leader to establish links with rural minority communities in the South of the United States. It organized a tour by an all-white delegation to a poor rural black neighborhood abutting a federally designated Superfund site in Mississippi in an effort to show solidarity with the "environmental justice" movement in opposing degradation of land, water and air in minority neighborhoods, in view of mounting evidence that US pollution disproportionately harms minorities.

The Environment Agency of Japan (EA) launched Asia's first international network to monitor acid rain, along the lines of networks and treaties in Europe and North America. The Environment Agency plans to invite scientists and administrators from East Asian countries to discuss the problem and try to reach a consensus on policy. The three year project aims to establish monitoring stations in some 20 locations ranging from Indonesia and various places in Southeast Asia, to Siberia. The EA is hopeful that this will lead to a treaty on acid rain.