Co dalej z polskim węglem?

This paper concerns ecology, one of the many fields covered in the T.P. PUNO Polish quarterly „Universitas” in Switzerland, which was researched by the author. The author explains two-phase heating and the benefits of the use of this type of stove with regards to air pollution. This article also touches upon the subject of ecological aid measures undertaken in Poland by Swiss institutions, at a time when Polish interest in ecological problems was just beginning.