Media playback is unsupported on your device

Controversial compressed air underwater cave energy project

The search for new ways to produce energy are often complicated and controversial - and in Northern Ireland, a project to compress air into caverns under the seabed is no different.

It will be used, along with gas, to run turbines when the wind does not blow.

However some are worried that the process could be damaging to the natural habitat, as Andy Martin reports.

  • 11 Oct 2015
Go to next video: How sea 'kite' energy would work