Around 200 campaigners are expected to protest outside the Senedd later against so-called 'fracking' in Wales.
Hydraulic fracturing involves pumping high pressure fluids into shale rock to recover gas and oil.
Campaigners 'Frack-Free Wales' say they have "grave environmental concerns" that the methods "are unsafe to our future generations."
They are planning to hand in a letter, addressed to the First Minister Carwyn Jones.
It is thought there is a substantial amount of gas under parts of South Wales.
The most controversial fracking issue here has centred around an application to test drill for shale gas at Llandow in the Vale of Glamorgan.
More top news
Dr James Lavers is part of the first coordinated group of NHS volunteers to be deployed by the UK Government.
Helen Plint has the latest weather forecast for Wales.
Dan Biggar has highlighted standards Wales must reach in their quest to end 61 years of hurt against world champions New Zealand.