Comprehensive Study Guide on Hydraulic Fracturing and Natural Gas Extraction

Hydrocarbons are compounds made only of hydrogen and carbon that store energy.
Used to power cars, jets, tools, and power plants.
Petroleum is heavily concentrated in the Middle East, while natural gas (methane, propane, butane) is spread widely around the world in underground shale rock.
Natural gas is used for heating and electricity, burns cleaner than coal, and vents into the air if spilled instead of creating oil slicks.

Oil and gas are trapped in thousands of tiny rock pockets rather than single large pools.
Hydraulic fracturing (fracking) frees trapped gas by pumping high-pressure fluid deep underground to crack shale rock.
Cracks create open pathways for oil and gas to flow into the well.

A single fracking well uses up to $7,000,000\,\text{gallons}$ of water.
At least $30\%$ of injected water stays trapped underground forever, removing it from the water cycle.
Fracking fluid contains water, sand (to prop open rock cracks), and chemical additives (to thicken fluid and prevent pipe buildup).
Additives and wastewater contain toxic substances like benzene, methanol, radium, and corrosive salts.
Regions like Pennsylvania ban sending untreated fracking wastewater to municipal treatment plants.

Water Contamination: Over-fracturing or broken well seals can contaminate freshwater aquifers with toxic fluid.
Air & Climate: Vented, unburned methane gas acts as a potent greenhouse gas that drives global warming.
Earthquakes: Re-injecting wastewater deep underground forces fluid into ancient faults, triggering earthquakes in states like Oklahoma, Texas, and Colorado.

Additional educational resources and videos are available at YouTube.com/SciShow.