Environmental Risk Factors on Cancer and Their Primary Prevention. Respiratory Function Changes from Inhalation of Polluted Air. Biological Monitoring by Means of Urinary Samples and Problems Concerning Concentration-Dilution of Spot Urine. Sick Building Syndrome. Respiratory Findings of Construction Workers Exposed to Asbestos Dust. Asbestos Exposure and the Risk of Lung Cancer in Urban Populations. Emphysema and Lung Mineral Content in Coal Workers. Sinonasal Cancer and Wood Dust Exposure. Chromium Accumulation of Chromate Workers' Bronchi. Benzene Toxicokinetics in Humans. Fluorometry of Carcinogenic Polycyclic Aromatic Hydrocarbons in Biological Systems. Occupational Exposure to Organic Solvents During Paint Stripping and Painting. Occupational Exposure to Metallic Cobalt. Climate and Chronic Respiratory Disease. Effects of Acid Precipitation on the Environment and on Human Health. Toxic Effects of Tannery Effluent on the Biochemical Constituents in Organisms. Bladder Cancer and Water Disinfection Methods. Metal-Induced Development Toxicity in Mammals. Genetic Evaluation of Pesticides in Different Short-Term Tests. Pesticide Residues in Food. Causes of Artefacts in Sorption Studies with Trace Elements. Bioaccumulation of Surfactants.