雅思阅读

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📖 Reading Passage

The concept of the 'Anthropocene' has gained significant traction among geologists and environmental scientists as a proposed new geological epoch, defined by the profound and lasting impact of human activities on the Earth's systems. Proponents argue that markers such as nuclear fallout from atomic tests, plastic pollution, and elevated carbon dioxide levels are stratigraphically distinct and will be visible in the rock record for millions of years. However, critics contend that the term is more culturally and politically charged than scientifically precise, noting that human-induced changes occur at varying rates across different regions and that the formal criteria for an epoch, such as a clear global boundary, are not yet fully met. This debate underscores a deeper tension between the desire for a clear narrative of planetary change and the complex, uneven realities of geological evidence.
❓ 文章によると、一部の科学者が人新世を地質時代として正式に認めることに反対する主な理由は何ですか?

✅ 正确答案

C. The geological evidence for human impact lacks a consistent global boundary.

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