Enlargement of the European Union and "morally imperative", which reflected the desire of the EU to admit these countries as members, even though they were less developed than the Western European countries. Following this Romania and Bulgaria, though were deemed initially as not fully ready by the Commission to join in 2004, acceded nevertheless on 1 January 2007. These, like the countries joining in 2004, faced a series of restrictions as to their citizens not fully enjoying working rights on the territory of some of the older EU members. Bulgaria and Romania are not yet members of the Schengen area; however, their citizens can travel
European Union Emission Trading Scheme safe carbon capture and storage (CCS) and innovative renewable energy (RES) technologies on a commercial scale within the European Union. Ahead of its accession to the EU, Croatia joined the ETS at the start of Phase III on 1 January 2013. This took the number of countries in the EU ETS to 31. On 4 January 2013, European Union allowances for 2013 traded on London's ICE Futures Europe exchange for between 6.22 euros and 6.40 euros. Phase IV will commence on 1 January 2021 and finish on 31 December 2028. The European Commission plans a full review of the Directive