A demonstrator with "Frack off" painted on her face joins an anti-fracking protest in London on March 19, 2014. Activists and demonstrators joined the Fracked Future Carnival to protest against fracking, the controversial technique that involves using huge amounts of pressurised water mixed with chemicals to crack open shale -- sedimentary rock containing hydrocarbons -- to release natural gas. Environmentalists have warned that the chemical-laced waste could be contaminating fresh water resources. AFP PHOTO / BEN STANSALL (Photo credit should read BEN STANSALL/AFP/Getty Images)
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