I watched a documentary on fracking by David Suzuki -The Nature of Things. It is an eye-opener that how dangerous fracking can be to the environment. It causes water pollution, air pollution and produces methane more than CO2 produced by other fossil fuels. Gas can show up in drinking water that if you put a match near your tap water/gas catches fire.
Here is a brief clip:
You can watch full documentary here.
Here is another interesting video:
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