Under the Kyoto Protocol, the 15 countries which were EU member states when the Protocol was agreed (the EU-15) are committed to reducing their collective greenhouse gas emissions in the period 2008-2012 to 8% below levels in a chosen base year (1990 in most cases).
Need 15 riiki, kes olid Kyoto protokolli sõlmimise ajal ELi liikmesriigid (EL 15), on võtnud protokollist tulenevalt endale kohustuse vähendada ajavahemikul 2008–2018 ühiseid kasvuhoonegaaside heitkoguseid 8 % alla võrdlusaasta taset (enamikul juhtudel on võrdlusaasta 1990).