Vehicles produce most of the atmospheric pollution in cities. How could the atmospheric pollution in cities be reduced? Select two options.

To reduce atmospheric pollution from vehicles in cities, we need to either decrease the amount of pollutants each vehicle produces or reduce the number of polluting vehicles. - **Develop fuel efficient engines:** These engines burn less fuel per kilometre, so they release fewer pollutants for the same journey. This is a direct reduction. - **Use electric cars:** Electric cars have no internal combustion engine and no exhaust pipe. They produce zero emissions at the point of use, which is a very effective way to reduce city air pollution. - Building more roads or making car tax cheaper would likely encourage more car use, increasing pollution. Building new car factories does not address the pollution from the cars themselves.