Despite all the buzz about domestic natural gas and oil resources revolutionizing the nation’s global energy role, many Americans haven’t heard of the controversial technique used to extract those resources.

More than half of those surveyed by the George Mason University Center for Climate Change Communication said they knew little or nothing at all about hydraulic fracturing, also known as fracking. About 28 percent of people surveyed said they’ve heard “some” about fracking, and just 10.6 percent heard “a lot.” (The figures add up to less than 100 percent due to rounding error, according to the Center.