The concept of the 'Anthropocene' has gained traction among geologists as a proposed new geological epoch defined by humanity's profound impact on Earth's systems. Unlike previous epochs, which were delineated by natural climatic shifts or biological events, the Anthropocene is characterized by markers such as nuclear fallout, plastic pollution, and elevated carbon dioxide levels. However, the proposal remains contentious. Some scientists argue that the term should be formalized to reflect the scale of human-induced change, while others contend that the changes are not yet synchronous across the globe, failing to meet the strict criteria of a geological time unit. This debate underscores a deeper tension between scientific classification and the recognition of human agency in shaping planetary history.
❓ 本文によると、一部の科学者が人新世を地質時代として正式に定めることに反対する主な理由は何か。
A. A. それを定義するために用いられる指標は、普遍的に合意されているわけではない。
B. B. 人為的な変化は、世界中で同時に発生しているわけではない。
C. C. 核降下物とプラスチック汚染は、研究するにはあまりにも最近のものである。
D. D. この概念は、過去の時代における自然な気候変動を無視している。
✅ 正确答案
B. Human-induced changes are not occurring simultaneously worldwide.
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