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Barcelona in two days with different particulate matter

Shipping emissions from a cruise next to the Barcelona harbour

Pollutants accumulated in the black layer in Po Valley, Italy

Urban background air quality research supersite Barcelona

African dust air masses. Only a thin layer of clean air in the middle.

High particulate matter from resuspension of clay dust in an industrial area of Spain

Zurich

Athens

Barcelona

Urban background air quality research supersite Barcelona

Rice fields burns close to Valencia, Spain

Boundary layer with high organic matter due to agricultural biomass burning