The creative execution is completely built around the concept of Earth Hour. The stickers were put up next to light switches. When the lights are switched off, a message appears thanking supporters for fighting climate change.

At zero cost, the sticker campaign got the public actively involved and helped make Earth Hour a success in Manila.

According to WWF, “more than a million Filipinos participated, reducing greenhouse gas emissions by as much as 30 tonnes in Luzon alone - equivalent to shutting down an entire coal-fired power plant!”The stickers were featured on CNN and national news, generating PHP1.2M additional media coverage. Continuing requests for stickers underscore the longevity of the effort through the innovative use of a medium. And the majority of stickers are still in place as a reminder of the importance of saving energy.