事实上,66岁以下的人自出生起就生活在这个纪元了。一支由35位国际顶尖研究者组成的“人类世”工作小组开展了纪元更变与否的投票,投票结果以30比3(有两位研究人员缺席)的压倒性优势宣布地质纪元进入“人类世”,并将开始时间确定为1950年。
The date isn’t random: it matches when the first nuclear tests created a new stratum in the planet’s surface.
这个日期可不是随便定的:它与首批核试验对地质表面造成影响的时间相符。
Actually, it won’t necessarily be nuclear tests that ended the Holocene. Humanity’s impact on the planet is so great that we’re left “spoiled for choice” in terms of which particular signal to choose.
实际上,核试验并非结束全新世的唯一必要条件。人类活动对地球的影响是如此深刻,可供选择的因素简直多到让人“眼花缭乱”,很难定夺到底哪一因素起了决定性作用。
Plastic pollution, soot from power plants, concrete and even domestic chicken bones were considered possible contenders.
塑料污染,发电厂煤烟,钢筋混泥土,甚至是家养鸡的骨头都被列入可能的影响因素。
“The radionuclides are probably the sharpest – they really come on with a bang,” said the Working Group’s chair Jan Zalasiewicz, of the University of Leicester. “But we are spoiled for choice. There are so many signals.”
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