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Hydraulic fracturing, or fracking, is a method used to extract natural gas and oil from deep rock formations known as shale. Using this method, drilling operators force water, sand, and a mix of chemicals into horizontally drilled wells, causing the shale to crack and release natural gas or oil.

CDC provides information for survivors and clinicians on tsunami health and safety concerns including flooding, disease outbreaks, food safety, water quality, and cleanup.

The Environmental Health Services Branch provides the practice-based research, training, technical assistance, and evidence-based guidance needed by state, tribal, local, and territorial environmental health practitioners to prevent environmental exposures and protect health.

CDC provides information for survivors and clinicians on tsunami health and safety concerns including flooding, disease outbreaks, food safety, water quality, and cleanup.

CDC provides information for survivors and clinicians on tsunami health and safety concerns including flooding, disease outbreaks, food safety, water quality, and cleanup.

CDC provides information for survivors and clinicians on tsunami health and safety concerns including flooding, disease outbreaks, food safety, water quality, and cleanup.

CDC provides information for survivors and clinicians on tsunami health and safety concerns including flooding, disease outbreaks, food safety, water quality, and cleanup.

CDC provides information for survivors and clinicians on tsunami health and safety concerns including flooding, disease outbreaks, food safety, water quality, and cleanup.

CDC provides information for survivors and clinicians on tsunami health and safety concerns including flooding, disease outbreaks, food safety, water quality, and cleanup.

CDC provides information for survivors and clinicians on tsunami health and safety concerns including flooding, disease outbreaks, food safety, water quality, and cleanup.