主题词：Groundwater and Isotope Geochemistry; Heavy metals in environment; Mine drainage and remediation techniques; Geochemistry and Geologic Mapping; Groundwater flow and contamination studies; Radioactive element chemistry and processing; Hydrocarbon exploration and reservoir analysis; Geochemistry and Elemental Analysis; Arsenic contamination and mitigation; Geology and Paleoclimatology Research; Geological and Geochemical Analysis; CO2 Sequestration and Geologic Interactions; Radioactivity and Radon Measurements; Methane Hydrates and Related Phenomena; Diverse Scientific and Economic Studies; Atmospheric and Environmental Gas Dynamics; Heavy Metal Exposure and Toxicity; Mercury impact and mitigation studies; Clay minerals and soil interactions; Radioactive contamination and transfer; Coal and Its By-products; Human auditory perception and evaluation; Metal Extraction and Bioleaching; Karst Systems and Hydrogeology; Isotope Analysis in Ecology