The concept of the 'Anthropocene' has gained traction among geologists as a proposed new geological epoch defined by significant human impact on Earth's geology and ecosystems. Unlike previous epochs, which were characterized by natural climatic shifts or biological events, the Anthropocene is marked by human-induced changes such as nuclear fallout, plastic pollution, and accelerated species extinction. However, the formal recognition of this epoch remains contentious. Critics argue that human impacts are not synchronous globally, with different regions experiencing changes at different times, making a single global boundary difficult to establish. Proponents counter that markers like the radioactive isotopes from mid-20th-century nuclear tests provide a clear, worldwide signal. This debate highlights a deeper issue: whether geological classification should prioritize measurable physical evidence or acknowledge the unprecedented scale of human agency in shaping planetary processes.
❓ 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認定することに反対する主な理由は何か。
A. A) 人間の影響は地球全体に均等に分布しているわけではなく、単一の開始日を特定することを複雑にしている。
B. B) この時代を定義するために用いられる指標、例えば核実験による放射性降下物は、すべての地域で検出可能なわけではない。
C. C) この概念は人間の主体性に焦点を当てすぎており、自然のプロセスを無視している。
D. D) 提案された時代は、その存在を裏付ける十分な物理的証拠を持っていない。
✅ 正确答案
A) Human impacts are not evenly distributed across the globe, complicating the identification of a single start date.
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