生词：
Emissions 排放
consequence 结果移重要性
capacity 容纳的能力
the biggest carbon footprints 最大的碳足迹
developed world 发达国家
was not as alarming担忧 as claimed宣称
Emissions n. 排放量
consequence n. 结果
consumption n. 消费
start by 开始于
developed world 发达国家
stagnating adj. 停滞不前
capacity n. 容量
carbon footprints 碳足迹
billion n.十亿
According to the author, population growth__.
A. would lead to major challenges
（会引发巨大的挑战）
B. was not as alarming as claimed
（不像声称的那样令人担忧）
C. would deplete existing resources
（会耗尽现有资源）
D. exerted no influence on emission
（对排放不施加任何影响）
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