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 delineated by natural climatic shifts or biological events, the Anthropocene is marked by anthropogenic markers 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 impacts, while profound, are not yet stratigraphically distinct enough to warrant a new epoch, as many changes are still in flux. Proponents counter that the scale and permanence of human alterations, including species extinction rates and terraforming activities, justify a distinct boundary. This debate underscores a broader tension between scientific classification and the growing awareness of humanity's role as a geological agent.
❓ 根据文章所述，正式承认“人类世”为新地质时代引发争议的主要原因是什么？
A. A. 人类的影响尚未广泛到足以影响全球生态系统的程度。
B. B. 一些科学家怀疑，人类引起的变化在地层学上是否足够显著且持久。
C. C. 所提出的纪元缺乏任何明确的标记，如放射性同位素或塑料污染。
D. D. 批评者认为自然气候变迁比人类活动更为显著。
✅ 正确答案
B. Some scientists doubt that human-induced changes are stratigraphically distinct and permanent enough.