The environmental impact of air pollution on the earth can be described as grave. Air pollution, particularly acid rain, is devastating forests, crops, and lakes over wide areas of North America and Europe. In many cities, ancient buildings have eroded more in recent decades than they had over the previous thousand years. Indications are that Third World countries are starting to experience damage as well. This document discusses the state of the earth in relation to the air pollution problem. Specifically discussed are: (1) "The Global Threat;" (2) "The Environmental Toll;" (3) "Reducing Emissions;" (4) "A Political Progress Report;" and (5) "An Agenda for Clean Air." (CW)