This documentary is about Hydraulic fracturing ("fracking") for natural gases in parts of America and the trail of contamination the process causes, (particularly drinking water) and examines both the impact on these communities and the rather shady practices of the gas companies and politicians involved.
It's very insightful and highly informative. Almost too informative at times, actually. However, I ultimately felt it was about 20-30 minutes too long - it was sometimes a bit repetitive or long-winded in presenting some of its points. I would highly recommend watching it though, if only for the extraordinary camerawork. The visuals are truly a feast for the eyes, totally hypnotic at times. 7/10