The controversial fracking process involves fluid being forced down a hole in the ground, fracturing the rock and releasing gas.
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A milder feel than last night but there's wind and rain on the way, and ice will form in places too!
Public Health Wales has spoken to ITV Cymru Wales about how to safe and well during the winter months.
Paramedics are poised to deal with any emergency – but 35,000 feet in the air is the last place you'd expect to have to spring into action.