“…However, since the late 2000s the EU has faced a conglomerate of crises (Falkner, ), most notably the economic and Eurozone crises (Gravey, ), the migration and refugee crisis (Byman and Speakman, ) and an ongoing legitimacy crisis, exemplified by the Brexit negotiations (Farstad et al ., ). This crisis period followed the EU's 2004 enlargement, which saw accession to the EU of states that were less well‐positioned than existing members to develop ambitious environmental policy and that sought, successfully in some cases, to reduce the ambition of environmental legislation (Skjærseth, ). The costs of environmental policy have become more politicized, as some member states have sought to block new legislation (Skjærseth, ; Skovgaard, ), and the economic crisis has been used to justify the pursuit of less ambitious, and crucially, less expensive policies (Burns et al ., ).…”