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. Proponents argue that markers such as nuclear fallout, plastic pollution, and elevated carbon dioxide levels provide clear stratigraphic evidence of human activity. However, critics contend that the term lacks precise temporal boundaries, as human influence has been gradual rather than abrupt, and that formalizing such an epoch may oversimplify the complex interactions between natural and anthropogenic processes. Despite this debate, the Anthropocene concept has proven valuable beyond geology, fostering interdisciplinary dialogue about humanity's role in shaping planetary systems and informing policy discussions on sustainability. Thus, while its geological status remains contested, its heuristic power in highlighting the scale of human impact is widely acknowledged.
❓ 根据文章所述，一些科学家反对将“人类世”正式确立为一个地质时代的主要原因是什么？
A. A. 人类活动的标志在岩层中并不足够独特，难以被识别出来。
B. B. 这一概念过多地受到政治议程的影响，而非科学证据的支撑。
C. C. 人类对地球的影响是渐进的，因此难以界定一个明确的起点。
D. D. 该术语在环境科学家中的普及程度尚不够。
✅ 正确答案
C. Human influence on Earth has been gradual, making it difficult to define a clear starting point.