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 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 formal recognition of this epoch remains contentious. Critics argue that human influence, while profound, lacks the global stratigraphic distinctiveness required for a formal geological boundary. Proponents counter that the unprecedented scale and synchrony of human-induced changes justify a distinct epoch, urging a redefinition of humanity's role in planetary history.
❓ 根据文章所述，围绕正式承认“人类世”的争议，主要原因是什么？
A. A. 提议的标志物，如核沉降物和塑料污染，年代过于近期，难以在地质记录中得以保存。
B. B. 一些科学家认为，人类影响并不符合形成独立地层边界的标准。
C. C. “人类世”的概念对基于自然事件的传统地质时代划分提出了挑战。
D. D. 目前缺乏足够证据表明人类活动在全球范围内引发了变化，不足以支持开启一个新的地质时代。
✅ 正确答案
B. Some scientists believe that human impact does not meet the criteria for a distinct stratigraphic boundary.