Extreme smog levels continue – free public transport in Kraków 

Due to persistent smog in Kraków, public transport is free of charge for the third day in a row. On Monday, measuring stations registered PM10 levels above 300 micrograms per cubic meter. The acceptable standard is 50 micrograms per cubic meter. Monday (January 30) is the 10th day of this month, when – because of smog…

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