The new song will also feature on the band's hotly-anticipated 'Notes On A Conditional Form' album, set for release on 22 May.
The 1975 have also committed to planting a tree for every ticket sold.
The song is set to feature on The 1975’s new album, 'Notes on a Conditional Form', scheduled for release on 21 February 2020.
The song is the latest offering from the fast-rising band's upcoming album, 'Notes On A Conditional Form'.
Stars including Radiohead and The 1975 have already joined the mission seeking to revitalise how the music industry tackles climate disaster.
'Young People Marching’ echoes the call for climate action heard in Raffi's 2007 song 'Cool It.'
The band’s step into eco-conscious clothing comes after frontman Matty Healy claimed that climate activist Greta Thunberg was snubbed by a lot of other big artists.