Poland contributes to the activities towards climate change mitigation undertaken by the international community - as a signatory to the United Nations Framework Convention on Climate Change since 1994 and to the Kyoto Protocol - since 2002. In the first commitment period under the Kyoto Protocol, Poland committed to reduce greenhouse gas emissions in 2008-2012 by 6%, compared to the base year. In the second commitment period, established in the Doha Amendment, the European Union, its Member States and Iceland committed to reduce their average annual greenhouse gas emissions in the years 2013-2020 under joint fulfilment of commitments. The common reduction target was expressed as a commitment to achieve average annual emissions of 80% of the total emissions of all countries in the base years (tab. 4.1). Poland established the year 1988 as the base year for carbon dioxide (CO), methane (CH4), and nitrous oxide (NO) emissions, whereas for SF6, fluorinated HFCs and PFCs - the year 1995, and for NF3 - the year 2000.