146In the light of the factors set out in paragraphs 138 to 145 of the present judgment, it must be pointed out that the Italian Republic has manifestly failed to adopt in good time appropriate measures to ensure that the period of exceedance of the limit values for PM10 is kept as short as possible in the zones and agglomerations concerned. Thus, exceedance of the daily and annual limit values for PM10 has remained systematic and persistent for at least eight years in those zones, notwithstanding the obligation for that Member State to take all appropriate and effective measures to comply with the requirement that the exceedance period should be kept as short as possible.
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