A new study has recommended that "fracking" for shale gas should only take place at least 600 metres down from channels carrying water supplies.
It says the controversial process can cause fractures in the ground that could reach nearby water sources. It's been claimed the flammable methane gas can pollute drinking water.
More top news
Dry overnight with clear spells, and becoming chilly. Dry for most areas on Sunday with variable cloud. Feeling warmer in any sunny spells
Dry and bright with variable cloud and some sunshine at times. Chilly start to Sunday but warmer later under any cloud breaks
A cool start to the weekend but a decent dose of sunshine. Mainly dry and winds becoming lighter