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. Proponents argue that markers such as plastic pollution, radioactive isotopes from nuclear tests, and elevated carbon dioxide levels are distinct enough to warrant a formal boundary in the stratigraphic record. However, critics contend that human-induced changes are diachronous, occurring at different times across the globe, which undermines the utility of a single, globally synchronous marker. This debate highlights a fundamental tension in geology between the need for precise chronological definitions and the recognition of complex, spatially variable environmental processes.
❓ 根据文章内容，批评者反对将“人类世”正式定义为地质时代的一个主要原因是什么？
A. 人类活动的影响尚不足以留下持久的地质痕迹。
B. 提议的标记物，如塑料污染，时间过于近期，难以进行研究。
C. 人类引起的变化并未在全球同步发生，这使得界定一个全球性界限变得复杂。
D. 人类世的概念与地层学研究关系不大。
✅ 正确答案
Human-induced changes did not occur simultaneously worldwide, complicating a global boundary.