The concept of the 'Anthropocene' has gained traction among geologists as a proposed new geological epoch defined by significant human impact on Earth's systems. Unlike earlier epochs, which were delineated by natural events such as ice ages or asteroid impacts, the Anthropocene is characterized by markers like 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 activity has not yet produced a sufficiently distinct and permanent stratigraphic signature to justify a new epoch, whereas proponents emphasize the unprecedented scale and speed of environmental change. This debate reflects broader questions about how science categorizes time and the role of human agency in shaping planetary history.
❓ 根据文章所述，人类世引发争议的一个主要原因是什么？
A. A. 所提出的时代缺乏人类影响的明确标志。
B. B. 一些科学家质疑人类的影响是否足够独特且持久。
C. C. 人类世仅基于冰河时期等自然事件。
D. D. 地质记录中没有核试验或塑料污染的迹象。
✅ 正确答案
B. Some scientists question whether human effects are distinctive and lasting enough.