Hundreds of children all over Wales have left school and are protesting the governments woeful inaction on climate change.
This strike is larger than the protest last month in which Wales only saw protests in Cardiff.
The previous walkout was part of a UK-wide action which saw more than 15,000 students attend strikes and demonstrations in more than 64 towns and cities. The coming event is expected to be bigger than the previous demonstration.
According to the protesters it is "driven by an alarming lack of Government leadership on climate action in previous decades".
In a statement they said: "Young people are determined to highlight the need for positive change to avert impending climate breakdown.
"This lack of leadership has been reinforced after only a handful of MPs attended the first climate change debate held in the Commons in two years, attracting widespread criticism."
The Cardiff march is seeing young people from not just the Welsh captial, but the Vale and the Valleys as well.
Do they have a point?
The evidence currently available overwhelmingly points to global warming being one of the major threats to humanity and that the problem is man made.
There is also a consensus among leading experts that the UK Government's response is falling very short of what is requried.
Reporter Emma Elgee is down in Cardiff Bay covering the protest.
It is looking pretty wet out there...
The Swansea students are braving the rain. At least they don’t have to put up with unseasonably hot weather.... yet.
Do the young people have a point?
Put simply - yes.
The evidence overwhelmingly suggests we are heading for a disaster urgent action.
A passionate protest going on in Swansea
Young people are braving the wind and rain to try and protect their futures.
Hundreds of children have marched down to the Bay from Cardiff city centre
Fair play, some of the banners are hilarious.
What are the children demanding?
The protesters have four demands:
- The Government declare a climate emergency and prioritise the protection of life on Earth, taking active steps to achieve climate justice.
- The national curriculum is reformed to address the ecological crisis as an educational priority.
- The Government communicate the severity of the ecological crisis and the necessity to act now to the general public.
- The Government recognise that young people have the biggest stake in our future, by incorporating youth views into policy making and bringing the voting age down to 16.