If Poland wasn't put under pressure by the EU to do something about it, they wouldn't, because the government doesn't give a toss.
They still don't care. Coal will continue to be used as the primarily fuel till at least 2050 according to the Polish government. There is no other economic option - importing is too expensive and renewables are still in their infant stages. Coal is plentiful and cheap hence that is what will continue to be used for the time being. If the EU wants us to stop using coal then they canpay for our natural gas imports or build clean power plants for us.
I assume many Polish people are also interested in the reduction of smog.
Yes of course they want to reduce the smog levels especially in the south - as long as their utility bills don't drastically increase though...
What you also have to understand is that Poles have always had a deep reverence for the coal industry and coal miners - even during communist times. Miners are as respected in society as say office workers or nurses or architects. They are paid quite well too for blue collar work. It has been this way for generations in Poland and although yes, people do want less smog, the industry isn't going away. In fact, there are plans to expand the coal industry as the demand for energy increases. There is no other low cost option for Poland, so unless the EU wants to subsidize Polish peoples' utilities and pay for our natural gas imports, that's what will continue for the foreseeable future.