The concept of the 'Anthropocene' has gained traction among geologists and environmental scientists as a proposed new geological epoch defined by significant human impact on Earth's geology and ecosystems. Unlike previous epochs, which were shaped by natural forces such as volcanic eruptions or asteroid impacts, the Anthropocene is characterized by human-induced changes, including nuclear fallout, plastic pollution, and accelerated biodiversity loss. However, the formal recognition of this epoch remains contentious. Some scholars argue that the markers of human activity, such as radioactive isotopes from mid-20th-century atomic tests, provide a clear and globally synchronous boundary. Others contend that the Anthropocene lacks the temporal longevity required for a formal epoch, as human impacts, while profound, are still relatively recent in geological timescales. This debate highlights a fundamental tension between the need for scientific precision and the broader cultural significance of acknowledging humanity's role in shaping the planet's future.
❓ アントロポセン（人新世）を地質学的な時代として正式に認定することに関する主な論争点は何ですか？
A. A. 人間の活動が重大な環境変化を引き起こしたかどうか。
B. B. 人間の影響の痕跡が明確であり、地球規模で同時期に発生しているかどうか。
C. C. 人新世が正式な時代区分として認められるほど十分に長く存在してきたかどうか。
D. D. 核爆発の放射性降下物が人間の活動の信頼できる指標となるかどうか。
✅ 正确答案
C. Whether the Anthropocene has existed long enough to qualify as a formal epoch.
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