The concept of the 'Anthropocene' has gained traction among geologists and environmental scientists as a proposed new geological epoch characterized by significant human impact on Earth's geology and ecosystems. Unlike previous epochs, which were defined 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. Proponents argue that these markers are distinct and persistent enough to warrant a formal boundary in the geological time scale. However, critics contend that the term overstates humanity's influence relative to natural processes, which have historically driven planetary change over millions of years. They also question whether the human footprint is globally synchronous, as geological epochs require a clear, worldwide starting point. This debate highlights the tension between scientific classification and the broader narrative of human agency in shaping the planet.
❓ 根据文章内容，以下哪项是一些科学家反对将“人类世”正式定义为地质时代的关键原因？
A. 人类活动的标志与自然过程之间的区别不够明显。
B. 人类对地球的影响时间尚短，难以精确衡量。
C. 所提出的标志物可能不会在全球范围内同时出现。
D. “人类世”这一术语带有过强的政治色彩，不适合用于科学领域。
✅ 正确答案
The proposed markers may not appear simultaneously across the globe.