雅思阅读

📖 Reading Passage

The concept of the 'Anthropocene' has gained traction among geologists as a proposed new geological epoch defined by human impact on Earth's systems. Unlike earlier epochs, which are distinguished by natural climatic shifts or biological events, the Anthropocene is marked by stratigraphic signals such as radioactive isotopes from nuclear tests, plastic pollution, and elevated carbon dioxide levels. However, the formal recognition of this epoch remains contentious. Critics argue that human effects are diachronous, meaning they appear at different times across the globe, which violates the synchronous boundaries required for a formal geological unit. Proponents counter that the mid-20th century 'Great Acceleration' provides a globally consistent marker, albeit one tied to industrial development. This debate highlights a fundamental tension: whether geological classification should prioritize measurable physical markers or reflect broader societal narratives about humanity's role in shaping the planet.