Message by UN Chief for the International Day of Clean Air for Blue Skies 2023
讲话致辞
讲话致辞
讲话致辞
双语：古特雷斯秘书长2022年国际清洁空气蓝天日致辞
Message by UN Chief for the International Day of Clean Air for Blue Skies 2022
讲话致辞
双语：古特雷斯秘书长2021年国际清洁空气蓝天日致辞
Message by UN Chief for the International Day of Clean Air for Blue Skies 2021
讲话致辞
双语：古特雷斯秘书长2020年国际清洁空气蓝天日致辞
Message by UN Chief on the International Day of Clean Air for Blue Skies 2020