36. What is the main idea of this essay?
(A) The tech industry has become the largest environmental concern.
(B) Digital infrastructure has significant but often overlooked consequences.
(C) Environmental costs of technology are secondary to its social benefits.
(D) The environmental impact of technology is largely stressed by the tech industry.

答案是：(B) Digital infrastructure has significant but often overlooked consequences. ✅

? 文章主旨分析

這篇文章核心在講：

? 科技產業（特別是數位基礎設施）對環境造成重大影響，但這些影響常被忽略或低估。

? 文章重點整理

① 第一段

• cloud（雲端）其實消耗大量能源

• 比商業航班排放還高

• YouTube streaming 也消耗大量能源

? 重點：看不見的數位基礎設施 → 高污染

② 第二段

• AI（如 ChatGPT）耗能巨大

• 用水量驚人（冷卻伺服器）

• 企業不願公開能源消耗

? 重點：影響大，但被低估／不透明

③ 第三段

• 能源分配影響民生（住房、電力）

? 重點：資源排擠效應

④ 第四段

• 礦產開採（鋰、鈷）造成污染

• 呼籲政策改變與永續策略

? 重點：整體環境成本很高

❌ 選項分析

(A) The tech industry has become the largest environmental concern.

錯 ❌

• 文章沒有說「最大」環境問題

• 沒有比較所有產業排名

(B) Digital infrastructure has significant but often overlooked consequences.

✔️ 正確

• significant = 影響巨大 ✔️

• overlooked = 被忽視 ✔️

• 完整符合全文主軸

(C) Environmental costs of technology are secondary to its social benefits.

錯 ❌

• 文中沒有比較「社會利益 > 環境成本」

(D) The environmental impact of technology is largely stressed by the tech industry.

錯 ❌

• 剛好相反：企業「保持沉默」，不是強調

? 正確答案

(B) Digital infrastructure has significant but often overlooked consequences.

? 一句話總結

? 科技不是無形的，它的「雲端與AI」其實帶來巨大但被忽視的環境成本。