Breadcrumb Home Gasland: HBO documentary key driver of opposition to fracking, study finds Friday, September 4, 2015 http://www.theguardian.com/environment/2015/sep/02/gasland-hbo-documentary-frac… A researcher at the University of Iowa is the first to use the Internet and social media to systematically show how a documentary film shaped public perception and ultimately led to municipal bans on hydraulic fracking.