Based on the following passage, what are the environmental consequences of fracking?

Context: The potential environmental effects of hydraulic fracturing include air emissions and climate change, high water consumption, groundwater contamination, land use, risk of earthquakes, noise pollution, and various health effects on humans. Air emissions are primarily methane that escapes from wells, along with industrial emissions from equipment used in the extraction process. Modern UK and EU regulation requires zero emissions of methane, a potent greenhouse gas. Escape of methane is a bigger problem in older wells than in ones built under more recent EU legislation.

Answer: The environmental effects of fracking include air emissions (primarily methane), groundwater contamination, high water consumption, groundwater contamination, land use, noise pollution, risk of earthquakes, and health effects on humans.