Officers were planning to carry out emissions tests across the country in a campaign called operation Smog.
Police were on the lookout for vehicles belching out smoke as a result of a faulty engine or a damaged exhaust system.
Scientists estimate that between 60 and 80 percent of air pollution in big Polish cities comes from road transport, public broadcaster Polish Radio’s IAR news agency reported earlier this year.
Polish police have said they checked more than a quarter of a million vehicles for emissions last year, taking some of them off the roads.
According to a report by the World Health Organisation (WHO), out of the 50 European cities most affected by smog, 33 are in Poland. The WHO estimates that around 50,000 Poles die every year due to illness caused by air pollution.
(pk/gs)
Source: IAR