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International Day of Clean Air for Blue Skies

International Day of Clean Air for blue skiesThe International Day of Clean Air for blue skies is observed annually on September 7th to promote global efforts toward achieving clean air and a healthy environment. This day, which was initiated by South Korea, has been officially recognized by the United Nations (UN) as an international observance. observe : 기념하다, 준수하다promote : 촉진하다, 홍보하다effort : ..

a cup of 영어 2024.08.29