The goal to keep the global average temperature to well below 2 °C and preferably to 1.5 °C by mid 21st century was adopted at the IPCC COP21 meeting in Paris in December 2015. The Paris Agreement is a legally binding international treaty on climate change adopted by 196 countries within the UN Framework Convention on Climate Change (UNFCCC). To achieve this goal, committed signatories are working to reverse the growing trend in global GHG emissions as soon as possible and to achieve climate neutrality by 2050.