The Kyoto Protocol is an international treaty negotiated in 1997 that came into force in 2005, requiring industrialized nations to reduce greenhouse gas emissions by 5.2% below 1990 levels by 2010. It represents the first step toward a global emissions reduction regime to stabilize climate change. A new framework must be negotiated and ratified by 2012 to deliver the stringent reductions recommended by climate scientists to prevent catastrophic impacts.