The concept of the 'Anthropocene' has gained significant traction in geological and environmental circles, referring to the current epoch in which human activity has become the dominant influence on climate and the environment. While the term was popularized by atmospheric chemist Paul Crutzen in 2000, its formal recognition as a geological epoch remains contentious. Proponents argue that unmistakable markers, such as radioactive isotopes from nuclear tests and ubiquitous microplastics, justify a distinct boundary. Critics, however, contend that these signals are too diffuse and temporally inconsistent to meet the rigorous criteria of the geologic time scale. Moreover, the debate extends beyond stratigraphy to philosophical questions about humanity's role in shaping Earth's future, highlighting a profound shift in how we perceive our species' impact.
❓ What is the main reason some experts oppose formalizing the Anthropocene as a geological epoch?
A. A. Because human impacts are not yet visible in geological records.
B. B. Because the proposed markers are too scattered and vary over time.
C. C. Because Paul Crutzen lacked the scientific authority to propose it.
D. D. Because the term focuses too much on philosophy rather than science.
✅ 正确答案
B. Because the proposed markers are too scattered and vary over time.
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