RE: Air quality in Vienna got significantly better in summer, but PM 2.5 (particulate matter) levels still more than double the WHO guidelines.

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memess (63)in Deutsch D-A-CH • 2 months ago

Yesterday, public transportation was free in my city to make air cleaner with less cars the thing is that they "air is good/bad" but based on what ?

2 months ago in Deutsch D-A-CH by memess (63)

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