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To frack or not to frack?

Supporters of fracking say it could be the future of the energy industry in the UK, allowing more access to natural gas and oil than ever before.

But it's a contentious issue, and has led to protests from critics who say it causes disruption, damages the countryside and increases the risk of water pollution.

These are issues that are being discussed at the Shale World UK conference.

Graham Satchell explains why it such a divisive subject.

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