The abstract paintings are linked to the theme of nature and especially to light pollution. Wherever you are, you should be able to see the sky at night and the wonderful sight it can give you, yet nobody does this anymore, because we are distracted by the bombardment of the city lights.
The paintings have to be symbolically seen as a window, which allows us to appreciate the sky once again. However, the sky here has been depicted with fog and this refers to another type of pollution, which is air.
These artworks try to face the issue of air pollution as well as the one of light. Finally, the purpose of them is to make people aware of this matter.