Opinion of the European Economic and Social Committee on ‘Proposal for a Directive of the European Parliament and of the Council amending Directive 2003/87/EC establishing a system for greenhouse gas emission allowance trading within the Union, Decision (EU) 2015/1814 concerning the establishment and operation of a market stability reserve for the Union greenhouse gas emission trading scheme and Regulation (EU) 2015/757’ (COM(2021) 551 final — 2021/0211 (COD)) ‘Proposal for a Decision of the European Parliament and of the Council amending Decision (EU) 2015/1814 as regards the amount of allowances to be placed in the market stability reserve for the Union greenhouse gas emission trading scheme until 2030’ (COM(2021) 571 final — 2021/0202 (COD))