Tens of thousands of people across the West Country are set to take part in a day of mass climate action today (20 September).
They include students who will be walking out of classrooms in Bristol, Bath, Gloucester, Taunton, Exeter and Truro.
Organisers hope it will be one of the biggest marches in history. They'll be presenting local councils with lists of environmental and economic demands.
Inspired by Swedish schoolgirl Greta Thunberg, the protestors are calling on the Government to make tackling climate change a priority.
Young activists from the Youth Strike 4 Climate movement have asked adults to join demonstrations, hoping for the biggest turnout yet.
Here is everything you need to know...
When is the climate strike?
The first strike will take place on Friday, September 20 and is designed to coincide with a UN emergency climate action summit in New York, with a second strike being held on September 27.
Where are strikes taking place?
All over the world, including America, Australia and Germany.
In the West Country, protests are planned in Bristol, Bath, Gloucester, Taunton, Exeter and Truro.
Strikes will also take place across the UK, with the main one happening at Westminster at 11am.
What's it all for?
Greta Thunberg inspired a global movement when she sat in front of the Swedish parliament and demanded action on climate change, inspiring the Fridays for Future movement.
Fridays for Future evolved into the Youth Strike for Climate movement, which says its students are "driven by an alarming lack of Government leadership on climate action over previous decades."
The coalition is calling on the Government to declare "a state of climate emergency" and educate the British public just how serious climate change is.
They're also demanding changes to the school curriculum which will include education about climate change.