ERO

Energy Regulatory Office (pol. URE).

ERU

Emission Reduction Units.

EU ETS

European Union Greenhouse Gas Emission Trading Scheme) EU emission trading scheme. Its operating rules are set out in the ETS Directive, amended by the Directive 2009/29/EC of the European Parliament and of the Council of April 23, 2009 (OJ EU L. of 2009, No. 140, p. 63—87).

EUA

European Union Allowances: transferable CO2 emission allowances; one EUA allows an operator to release one tonne of CO2.