WWF Canada is asking people to contribute to a crowd-sourced Anthem in honor of Earth Hour, which takes place on 31st March. Fans can submit their own lyrics through WWF Canada's Facebook page until March 18th, when composer Andrew Huang will take the top ranked entries, plus ten of his personal favorites, and use them to write the final anthem. The song will be performed live at an Earth Hour rally in Toronto at 7.30pm on the 31st. John St. is the creative agency behind the effort, with French adapation work for Quebec by Headspace.