The call to save energy and cut CO2 dates back to 1997's Kyoto Protocol, which asked industrialized nations to reduce their emissions of greenhouse gases. By the time the Kyoto Protocol took effect in 2005, the need to do so had become even more urgent.
節能減碳的訴求，其實早在 1997 年國際間制定「京都議定書」、要求工業化國家溫室氣體減量時即已提出，2005 年議定書正式生效，各國落實節能減碳的時程更趨急迫。