151Moreover, as regards the Italian Republic’s argument that the deadlines which it has laid down are wholly appropriate to the extent of the structural changes necessary to put an end to the exceedances of the limit values for PM10 in ambient air, highlighting in particular difficulties pertaining to the socio-economic and budgetary implications of the investments to be made and local traditions, it should be recalled that that Member State must establish that the difficulties on which it relies in bringing to an end the exceedances of limit values for PM10 are such as to rule out the possibility that shorter deadlines could have been set (see, to that effect, judgment of 22 February 2018, Commission v Poland, C‑336/16, EU:C:2018:94, paragraph 101).
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