1. Why cars consume more fuel ? 1. 車子為何會耗油？

Answer : Fuel molecules did not completely burned so it consumed more fuel, which caused the carbon accumulation day after day.
Suppose the fuel burned 70%, the rest unburned 30% will be wasted (consumed) and cause carbon accumulated as a result.


答：油分子未完全燃燒，所以耗油，再經日積月累就造成積碳！
假設：汽油燃燒70％未燃燒的30％不但浪費掉（耗油）且會變成積碳。