The variation indicates that there is substantial scope to increase performance and reduce environmental effects [ 3.2 ] . Note : AT = Austria ; BE = Belgium ; BG = Bulgaria ; CY = Cyprus ; CZ = Czech Republic ; DE = Germany ; DK = Denmark ; EE = Estonia ; ES = Spain ; FI = Finland ; FR = France ; GR = Greece ; HU = Hungary ; IE = Ireland ; IT = Italy ; LT = Lithuania ; LV = Latvia ; NL = Netherlands ; PL = Poland ; PT = Portugal ; RO = Romania ; SE = Sweden ; SI = Slovenia ; SK = Slovakia ; and UK = United Kingdom .