79. A carbon footprint is the amount of greenhouse gases, primarily carbon dioxide, released into the atmosphere by a particular human activity. Which of the following activities has the highest carbon footprint？
(A) use air conditioner overnight (need 20 kwh electricity)
(B) eat beef noodle for lunch (eat 0.25kg beef)
(C) ride scooter for 50 km (spent 3Liter gasoline)
(D) ride U-bike to school for a month

答案：登入後查看
統計： A(44), B(20), C(16), D(1), E(0) #2319643

B1 · 2023/04/17

#5779576

79. 碳足跡是指特定人類活動釋放到大氣中的溫室氣體量，主要是二氧化碳。以下哪項活動的碳足跡最大？

（A）通宵使用冷氣機（需要20千瓦時的電力）

（B）午餐吃牛肉麵（吃0.25公斤牛肉）

（C）騎機車50公里（花了3升汽油）

（D）騎Ubike去學校一個月