Plug-in hybrids run for a longer time on electricity and so are less polluting than regular hybrids. Having read the above passage, choose the right answer to the following question (choices are longer time or shorter time ): Ian wants to produce more pollutants, so he buys a car that is a plug-in hybrid. The car will run on electricity worse if it's plugged in for a longer time or shorter time?
Answer:
shorter time