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. Unlike previous epochs, which were delineated 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. However, the formal recognition of this epoch remains contentious. Critics argue that human impacts, while profound, are not yet stratigraphically distinct enough to warrant a new epoch, as many changes are still in flux. Proponents counter that the scale and permanence of human alterations, including species extinction rates and terraforming activities, justify a distinct boundary. This debate underscores a broader tension between scientific classification and the growing awareness of humanity's role as a geological agent.
❓ According to the passage, what is the main reason for the controversy over formally recognizing the Anthropocene as a new geological epoch?
A. A. Human impacts are not yet widespread enough to affect global ecosystems.
B. B. Some scientists doubt that human-induced changes are stratigraphically distinct and permanent enough.
C. C. The proposed epoch lacks any clear markers such as radioactive isotopes or plastic pollution.
D. D. Critics believe that natural climatic shifts are more significant than human activities.
✅ 正确答案
B. Some scientists doubt that human-induced changes are stratigraphically distinct and permanent enough.
IELTS Reading Tips
Skim the questions first, underline keywords, then locate in the passage
Watch for paraphrasing; correct answers are often reworded
Be wary of absolute statements (all, always, never) — usually wrong
Pay attention to content after transition words (however, but, yet)
Manage time: about 20 minutes per passage; skip difficult questions first