我们生活的世界有六分之一的人死于本来可以轻松治愈的传染性疾病；八分之一的人死于空气污染，主要原因是很多人用牛粪和树枝为燃料在室内做饭；数十亿人生活在赤贫当中，既缺少电能又食不果腹。
We live in a world where one in six deaths are caused by easily curable infectious diseases; one in eight deaths stem from air pollution, mostly from cooking indoors with dung and twigs; and billions of people live in abject poverty, with no electricity and little food.