Multiple ChoiceΆσκηση 53 από 77

We are all (0) FAMILIAR with air pollution, (1) .......... if we live in busy cities and suffer with pollution from factories and heavy traffic. But many of us don't take light pollution (2) ........... Compared to the skies of our grandparents, the night isn't (3) .......... as dark as it used to be because the use…