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After urban sources, mineral dust in Madrid is the second biggest contributor to PM 10 , making up 40% on average, of total emissions. Approximately, 50% of the days on which the daily limit of 50 μgm −3 marked by the European Directive, are ascribable to Saharan outbreaks. The present study has focused on individual particle characterization of North African dust over Madrid by SEM/EDX,...
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