Levels of air pollution in Warsaw have reached very unhealthy levels during the last three days, which pose health risks.
Still the city district where we live is a little better, as situated close to Wisla river. This is how it looked today in the morning.
It is 400% higher than the safe level.

It's the same or even worse in other majors towns, including Krakow.
Poland has the most polluted air in Europe!