Glyn Rhonwy quarry lake: Gwynedd power plan approved
2 September 2013 Last updated at 21:28 BST
Controversial plans for a £100m mini hydroelectric power scheme on the edge of Snowdonia National Park have been backed by Gwynedd councillors.
There was a protest in the public gallery after the decision on the Glyn Rhonwy pump storage project was made.
The Snowdonia Society is concerned about its possible effects on wildlife, culture and heritage.
But developer Quarry Battery Company (QBC) said it was the "missing piece of the jigsaw for renewables".