Not gonna happen, Poland barely has enough power to sustain itself, with so little energy investment that we are going to experience serious deficits in the next decade during electricity consumption peaks (mainly hot summer days with AC systems at full capacity). There are some plans to build new coal units, but these obviously meet with a lot of justified protest. There are also plans to build nuclear units, but only in some undefined distant future and they could meet with protest too. And renewables are gaining ground too slowly to replace coal (which will be shutting down over time due to brown coal depletion, environmental impact and aging technology). Not that wind and solar can completely replace fossil fuels, nuclear and hydro – the variance in output is too great and beyond our control at the moment. Personally, I think major investment in nuclear would be best. It would cost a lot though, there's no way around that. But environmental impact would be greatly limited and a Europe–wide effort could significantly reduce costs. Unfortunately it seems that it's not gonna happen, with Germany for example irrationally shutting down plants after Fukushima was hit with a tsunami (as if there was any risk of a natural disaster in Germany).

Funny how that keeps being said about most of Germany's neighbouring countries... usually the claim is they'd import nuclear energy from France. Also funny how, in net terms, this never happens, and Germany has pretty consistently been a net exporter of electricity.