1. Molecular Markers and Environmental Organic Geochemistry: An Overview ; CONTEMPORARY BIOGENIC MARKERS ; 2. Signature Lipid Biomarker Analysis for Quantitative Assessment In Situ of Environmental Microbial Ecology ; 3. Diether and Tetraether Phospholipids and Glycolipids as Molecular Markers for Archaebacteria (Archaea) ; 4. Seasonal Variation in Sedimentary Microbial Community Structure as a Backdrop for the Detection of Anthropogenic Stress ; 5. The Use of Aromatic Acids and Phospholipid-Ester-Linked Fatty Acids for Delineation of Processes Affecting an Aquifer Contaminated with JP-4 Fuel ; 6. Application of Chlorophyll and Carotenoid Pigments for the Chemotaxonomic Assessment of Seston, Periphyton, and Cyanobacterial Mats of Lake Okeechobee, Florida ; 7. Higher Molecular Weight Terpenoids as Indicators of Organic Emissions from Terrestrial Vegetation ; FOSSIL BIOMARKERS ; 8. Applications of Biomarkers for Identifying Sources of Natural and Pollutant Hydrocarbons in Aquatic Environments ; 9. Biogeochemical Marker Profiles in Cores of Dated Sediments from Large North American Lakes ; 10. An Application of Biomarkers in a Preliminary Environmental Study of the Lower Daintree River, North Queensland, Australia ; 11. Preliminary Study of Organic Pollutants in Air of Guangzhou, Hong Kong, and Macao ; ANTHROPOGENIC MARKERS ; 12. Anthropogenic Molecular Markers: Tools To Identify the Sources and Transport Pathways of Pollutants ; 13. Alkylbenzenesulfonates in Recent Lake Sediments as Molecular Markers for the Environmental Behavior of Detergent-Derived Chemicals ; 14. Linear Alkylbenzenesulfonates and Polychlorinated Biphenyls as Indicators of Accumulation, Biodegradation, and Transport Processes in Sewage Farm Soils ; 15. Fluorescent Whitening Agents as Molecular Markers for Domestic Wastewater in Recent Sediments of Greifensee, Switzerland ; 16. Interpretations of Contaminant Sources to San Pedro Shelf Sediments Using Molecular Markers and Principal Component Analysis ; 17. Use of Trialkylamines as a Marker of Sewage Addition into the Marine Environment ; 18. Aliphatic Hydrocarbons, Linear Alkylbenzenes, and Highly Branched Isoprenoids in Molluscs of the Adriatic Sea, Italy ; 19. 2-(4-Morpholinyl)benzothiazole as an Indicator of Tire-Wear Particles and Road Dust in the Urban Environment ; 20. Detecting and Distinguishing Sources of Sewage Pollution in Australian Inland and Coastal Waters and Sediments ; 21. Questions Remain in the Use of Coprostanol and Epicoprostanol as Domestic Waste Markers: Examples from Coastal Florida ; 22. The Use of Azaarenes as Indicators of Combustion Sources to the Urban Atmosphere and Estuarine Systems ; 23. Toxaphene Residue Composition as an Indicator of Degradation Pathways ; 24. Soot as a Strong Partition Medium for Polycyclic Aromatic Hydrocarbons in Aquatic Systems ; 25. Polychlorinated Biphenyls as Probes of Biogeochemical Processes in Rivers ; 26. Transport and Degradation of Semivolatile Hydrocarbons in a Petroleum-Contaminated Aquifer, Bemidji, Minnesota