When the pupils in Whitelees School of Rock recorded their first song - new lyrics promoting Fairtrade to the music of John Lennon's hit song "Imagine" - they caught the attention of his widow, Yoko Ono. Now, via their latest number, band members are taking on climate-change sceptics.
The inspiration for the song, called "We've got to Believe", came from pupils' frustration with the people who dismiss climate change as a myth, explained headteacher Ann Kay.
"We are going for our fourth green flag and we asked the children what was important to them. They told us climate change: people really need to understand it is happening," she said.
"In February 2008, we launched a song to raise awareness about the Fairtrade movement, so it was natural for us to do another, this time about climate change."
The band comprises pupils from P5-7 at the Cumbernauld school. They wrote the lyrics and music for the new track with the help of P7 teacher Tom Benham.
The song was launched at a special event at the school, where each class told visitors what they were doing to save the planet.