Question: Wanne ne daga cikin waɗannan albarkatun da ake sabuntawa ke haifar da ƙarin gurɓatar ruwa idan aka yi amfani da shi don samar da makamashi?
Options:
ruwa
iska
makamashin tsirrai da dabbobi 
makamashin ƙarƙashin ƙasa 
Answer: C