Al Jazeera: While a debate rages over the use of hydraulic fracturing to exploit fossil fuel reserves inland, the practice has quietly taken hold offshore, in the Gulf of Mexico.
Documents obtained by Fault Lines reveal that the worlds largest oil firms are now fracking in some of the Gulfs deepest waters -- raising questions about how it is being regulated.
A list of about 100 well sites offers one of the first snapshots of the practice, which until just a couple years ago was unknown to the public....