Researchers at Durham University have published a major report looking into the dangers of fracking. They say fracking, which involves fracturing rocks to release shale gas, is relatively safe. But drilling boreholes, whether for fracking or not, is potentially dangerous.
Richard Davies from Durham University says there is some sort of risk with every energy technology.
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The remaining two anti-fracking protestors who climbed a rig at a live well site in Kirby Misperton, North Yorkshire, have been removed.
The incident near Fenrother involved a Honda Civic travelling south from Scotland and a Seat Ibiza travelling north from Morpeth.