Bright blue sky over dry field.

50年的气候犹疑

悉尼——1965年11月,美国总统林登·约翰逊拿到了有史以来第一份警告大量燃烧化石燃料可能带来危险的政府报告。五十年在政治领域是相当长的时限,因此政府自那以后一切照旧、几乎未采取任何措施解决危机就愈加的引人注目。

约翰逊的科学顾问委员会极有先见之明地警告说向大气中排放二氧化碳将引发全球气温升高,从而导致冰盖融化和海平面迅速升高。 “人类在不知不觉中进行了一次超大规模的地球物理实验,”科学家们警告道。 “人类在短短几代人时间里燃烧了过去5亿年地球缓慢积累的化石燃料...二氧化碳含量升高引发的气候变化可能会给人类带来不小的损害”。

该委员会的先见之明并不出人意料;自从1824年法国物理学家约瑟夫·傅立叶提出地球大气就像绝缘体般捕获本该散失的热量后,科学就一直承认温室效应的存在。而在1859年爱尔兰物理学家约翰·廷德尔通过实验室实验证明二氧化碳具有增温能力后,瑞典物理学家兼诺贝尔奖得主斯万特·阿累尼乌斯就预言烧煤会温暖整个地球——他将此视之为一种积极的现象。

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