Blake record is Earth Hour song
Blake's track, Beautiful Earth, has been announced as the anthem for WWF's Earth Hour in the UK.
The song by the Classical Brit winners, taken from their album Together, has already had backing from former US Vice President Al Gore and will be released as an online single on March 22, with all profits donated to the environmental charity.
The group's Stephen Bowman said: "Ever since a child in the 80s I've known WWF and its iconic panda logo, but I never dreamed one day I'd be able to do something to help them around the world - we hope that us joining the Earth Hour campaign, using a simple song to spread the message worldwide, will show we're all in this together."
Bandmate Humphrey Berney added: "WWF has always been at the forefront of campaigning and acting to preserve the planet. It is wonderful to be involved in their great work, especially at such a critical time."
On March 27, millions of people around the world will show they care about climate change by turning off their lights for an hour - Earth Hour - at 8.30pm.
:: Beautiful Earth will be released online on March 22, and a special edition of Together will be released on March 29.