電動機車本身雖不會排放任何廢氣，但其動力來源電力生產，在台灣與世界上許多國家依然需要消耗化石燃料，因此會製造與排放二氧化碳。澎湖地區的電力生產主要由尖山火力發電廠，使用柴油發電機，燃燒柴油與重油所產生。並以中屯與湖西風力發電站輔助，其發電過程產生每度電之二氧化碳與台灣並不相同，因此在澎湖使用的電動機車衍生之二氧化碳排放量也與台灣地區不盡相同。本文將深入探討澎湖地區因風力發電機組增加，而造成每單位發電量所產生二氧化碳排放量的改變，來研究在澎湖使用電動機車對環境造成之影響。分析結果發現，目前在澎湖使用電動機車，行駛每公里衍生之二氧化碳排放約為24公克，比台灣地區值25公克更低，只有50cc汽油引擎機車產生值49公克／公里的一半。而未來風力發電機組繼續增加，將使該地區電動機車行駛每公里衍生之二氧化碳排放降到只有13.5公克，是汽油機車49公克／公里的27.5%。

Despite electric scooters do not emit any gas, their power come from electricity. Carbon dioxide and other by-products are produced simultaneously with electricity through the burning of fossil fuel in Taiwan and many other countries. The majority of electricity in Penghu from Genshan Power Plant is produced by diesel engines through the burning of heavy oil and diesel fuel. The remaining portion of electricity is produced by wind turbines installed in Chung-Tun and Husi. The emission amount of carbon dioxide by generating each unit of electricity is different from that in Taiwan. Therefore, the net carbon dioxide emission by electric scooter in Penghu is different from that in Taiwan. The main purpose of this paper is to investigate the net carbon dioxide emission by electric scooters in Penghu, in which the electricity is generated by different proportion of wind power and fossil fuel. In our finding, the net carbon dioxide emission by an electric scooter is 24 gram per kilometer, which is slightly less than the value of 25 gram per kilometer emitted by the same electric scooter in Taiwan. It is only about half of the value (49 gram per kilometer) emitted by a scooter with a 50cc gasoline engine. The wind-generated electricity will increase as the number of wind turbines installed in Penghu increases in the near future. Therefore, the net carbon dioxide emission by a electric scooter will continue to decrease to 13.5 gram per kilometer, which is only 27.5% of that emitted by a gasoline scooter, when half of total electricity is generated by the wind power.