Winter tree Massmo Relsig/Flickr

地球年

斯托克霍姆—4月22日,世界将迎来第45个地球日。地球日设立于1970年,是为了引起人们对环境挑战的注意。如今,气候挑战比以往任何时候都要艰巨和紧迫。气候变化、生物多样性丧失和自然资源枯竭正在把地球推向临界点,越过了这个点,可持续发展和减贫等目标实现难度就将大大增加。

1970年以来,科学家不但认识到人类活动是地球环境变化的主因,还认识到人类正在让地球超越其自然极限。如果我们不迅速做出重大改变,结果将是灾难性的。

五年前,全球领导人似乎认识到了这一点,他们同意将本世纪全球升温幅度限制在前工业化水平之上2℃以内——超过这与阈值,就有可能引发气候变化的灾难性后果。但迄今仍未采取减少温室气体排放的强大动作。相反,排放大幅增加;结果是去年成为有记录以来最热的一年。

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