Pubs, bars and restaurants are places where smoking policy is still left to the discretion of the manager and where smoking is often permitted. However, there is demand to take measures to eliminate or reduce the effects of environmental tobacco smoke (ETS) to non-smoking occupants. This paper reports the results of a field study in which ETS markers and air flow patterns were monitored in a number of occupied spaces.

Improvement in contamination control for a LCD color filter coater was studied by using a mini-environmental design. Different operating conditions of the door and the exhaust of the mini-environment were studied. Measurements of particle concentration flow field, and VOC concentration were performed. Both the particle contamination to the coating process and the VOC contamination to the outside cleanroom environment were considered in this study. lt was found that a minienvironment could be designed to significantly reduce the particle concentration.

The paper presents results of interlaboratory comparison on the emission of formaldehyde from mineral wool board. Eleven laboratories took part in these studies. The results showed significant variances between laboratories. The discrepancy was related to the chamber conditions and sampling

Energy efficient ventilation has a key role to play in achieving the Government's objectives for reducing carbon-dioxide emissions. Ian Andrews discusses the background to the issues.

The materials from which a building is constructed make a significant contribution to its overall impact on the environment. This impact is felt in a number of ways; locally. through the effects of activities such as quarrying; globally, as a result of carbon dioxide released by using energy used to manufacture the materials; and internally, in the effects on the health of the occupants of the building. Some of these effects are easier to measure than others. and comparisons between the seriousness of the different effects are difficult to make.