An experimental and theoretical investigation into the range and nature of exposure of the nonsmoking public to respirable suspended particulates from cigarette smoke is reported. An assessment of public health policy implications is presented. (Author/RE)

The pros and cons of air pollution control efforts are discussed. Both national and regional air pollution control plans are described. Topics of discussion include benefit-cost analysis, air quality regulation, reducing ozone in the urban areas, the Los Angeles plan, uncertainties, and policy implications. (KR)

It is suggested that a system of relative standards be formulated which would compare utility of substances to their relative risk as carcinogens. This would define a range of use restrictions. Substances intended for specific uses would then be regulated according to these standards. (Author/RE)

Poses questions about how we can control the acquired immune deficiency syndrome (AIDS) epidemic and the harm that it causes without unjustly discriminating against particular social groups and without unnecessarily infringing on the freedom of individuals. (TW)