Final answer:
The best way to reduce air pollution is to 'produce less air pollution' by switching to nonpolluting energy sources, improving vehicle emission reductions, and optimizing energy use. Option B is correct.
Step-by-step explanation:
The most effective way to reduce air pollution is through multiple approaches focused on reducing the production of pollutants. Switching to cleaner energy sources, including energy-efficient transportation, is crucial.
To address the question, option b, 'produce less air pollution', is the broadest and most comprehensive choice. It encapsulates a variety of strategies such as using less energy, switching to nonpolluting energy sources like solar or wind, and improving emission reductions in vehicles.
Solutions like electric and hybrid vehicles offer significant emission reductions; they either produce zero tailpipe emissions or run at optimum efficiency for better fuel economy and less pollution.
Additionally, efforts in transportation planning help reduce emissions and fuel consumption. In contrast, options like 'sell more cars worldwide' would likely increase air pollution unless all those cars were zero-emission vehicles.