Natalie Isaacs, founder of Australian women's climate movement 1 Million Women, was facing a dilemma. The former cosmetics entrepreneur turned climate activist had embraced the suggestion of collaborator Andreas Smetana that it would be an "amazing idea" to create an anthem - a call to action - before the international Paris climate summit at the end of this month. But for weeks they couldn't come up with the right song. Then a friend suggested a reworking of John Farnham's powerful 1980s hit, You're the Voice. "I thought yes, we could launch this ahead of the Paris conference and make this an utterly inspiring call from women for climate action," Ms Isaacs says. "When I listened to the words, it's a timeless song, perfect for this and the message is so strong. I just set out to get that song." A video, featuring singers Deni Hines (pictured with Ms Isaacs), Wendy Matthews, Aboriginal singer and actor Ursula Yovich and actor Claudia Karvan will be launched on Wednesday.