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Hydrogen sulfide
- Volcanic Gases Can Be Harmful to Health, Vegetation, and Infrastructure (U.S. Geological Survey)U.S. Geological Survey
- What Are Volcano Hazards? (U.S. Geological Survey) - PDFU.S. Geological Survey ... PDF
- Post-Infectious IBS (PI-IBS) (International Foundation for Gastrointestinal Disorders) - PDFInternational Foundation for Gastrointestinal Disorders ... PDF ... IBS can be caused by a variety of factors. One common cause of IBS is infectious gastroenteritis, ...