在阅读理解的挑战中，英语考研阅读题目的关键在于快速准确捕捉文章的主旨和细节。以下是对一道典型考研英语阅读理解题目的解析：
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题目：
In the passage, the author suggests that the primary challenge facing the modern world is:
A. economic inequality
B. environmental degradation
C. technological advancement
D. cultural diversity
解析：
The passage discusses the multifaceted challenges that the modern world is facing. While each option presents a significant issue, the author's focus is primarily on the environmental impact of human activities. The text explicitly mentions the consequences of climate change and the depletion of natural resources, suggesting that environmental degradation is the most pressing issue. Therefore, the correct answer is B. environmental degradation.
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