The concept of the 'Anthropocene' has gained traction among geologists as a proposed new geological epoch defined by significant human impact on Earth's geology and ecosystems. Unlike previous epochs, which were demarcated 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, scholars debate its formal recognition, arguing that human influence began thousands of years ago with agriculture, not just in the mid-20th century. This disagreement highlights the challenge of defining a time boundary when human activities have been gradual yet globally pervasive.
❓ 关于正式承认“人类世”为新地质时代之争的主要原因是何？
A. A. 人类影响的标志在地质记录中无法检测到。
B. B. 科学家们对于人类对地球的影响何时开始变得显著存在分歧。
C. C. 该时代距今太近，地质学家无法对其进行研究。
D. D. 人类活动尚未对地球生态系统产生全球性影响。
✅ 正确答案
B. Scientists disagree on when human influence on Earth began significantly.