The Kyoto Protocol officially entered into force on February 16, 2005. It had been signed (adopted) in Kyoto, Japan, on December 11, 1997. The international treaty was a major step in global climate policy as it aimed to achieve reductions of greenhouse gas emissions.
It was succeeded by the Paris Agreement, a legally binding international treaty on climate change signed by 196 parties at COP21 in Paris on December 12, 2015. The Paris agreement entered into force on November 4, 2016, and has seen nearly universal participation. However, it allows for voluntary withdrawal.