That commitment in principle became concrete in 1997,in Kyoto, when the industrialised nations set an objective for 2012: to reduce emissions of carbon dioxide (CO2) by 5% from 1990 levels.
Cuireadh an tiomantas ibprionsabal sin i bhfeidhm go fírinneach i 1997, in Kiótó, nuair a leag nanáisiúin thionsclaithe síos cuspóir do 2012: astuithe dé-ocsaídecarbóine (CO2) faoi 5% ó leibhéil 1990.