«7/24 tm» № 37 (172) 11.09.2023
One of the commemorative dates of the United Nations – the International Day of Clean Air for blue skies was designated September 7. In 2020, it was celebrated for the first time.
«7/24 tm» № 37 (172) 11.09.2023
One of the commemorative dates of the United Nations – the International Day of Clean Air for blue skies was designated September 7. In 2020, it was celebrated for the first time.
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