Directive 2003/87/EC of the European Parliament and of the Council established a system for greenhouse gas emission allowance trading within the Union, in order to promote reductions of greenhouse gas emissions in a cost-effective and economically efficient manner.
Le Treoir 2003/87/CE ó Pharlaimint na hEorpa agus ón gComhairle, bunaíodh córas le haghaidh trádáil ar lamháltais i gcomhair astaíochtaí gás ceaptha teasa laistigh den Aontas chun laghduithe ar astaíochtaí gás ceaptha teasa a chur chun cinn ar bhealach costéifeachtach, éifeachtúil ó thaobh an gheilleagair de.