Latin American Herald Tribune: "
WARSAW – The Polish city of Krakow, where high levels of air pollution have been reached in recent winters, offered on Tuesday free public transport to travelers in a bid to reduce the use of private vehicles, local authorities said on Radio Poland.
The city’s government also called on residents to go outdoors as little as possible due to high pollution levels.
Poland has 33 of the 50 most polluted cities in Europe, with worryingly high levels of airborne particles, according to a report by the World Health Organization published in 2017."