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Sampling the Environment: Twelve Key Questions That Need Answers

This review discusses the vital importance of field sampling as the first stage in the process of measuring the concentration of any components in the environment. The priorities for future research in this subject are identified by reference to twelve key questions that need to be addressed. These questions raise controversial issues, which need resolution before significant progress can be made in improving the quality of environmental measurements, and perhaps more importantly, the reliability of the decisions that are made worldwide that are based on these measurements.