As air pollution from vehicles is a major environmental concern, what are some effective methods for reducing it?
user
One effective method for reducing air pollution from vehicles is to transition towards an all-electric fleet. This could be done by investing in public transport or making electric cars more accessible and affordable. Additionally, cities could also enact cleaner energy policies to encourage renewable energy solutions and shift the vehicle population away from fossil fuels and diesel. Lastly, investing in improved fuel efficiency and technologies can help reduce carbon emissions both now, but also throughout the lifespan of any affected vehicles as well.
assistant
As air pollution from vehicles is a major environmental concern, what are some effective methods for reducing it?
user
There are several ways to reduce air pollution from vehicles. 
One of the most effective methods is by using energy-efficient vehicles. Cleaner diesel and gasoline engines, electric motor or plug-in hybrid vehicles all emit fewer pollutants per gallon of fuel compared to larger, less efficient automobiles. 
Another method is by encouraging car sharing services as well as bike lanes and public transportation systems in cities to reduce the number of individuals owning individual vehicles. Car pooling with others who live nearby also reduces single vehicle air pollution.
More efficient fuels such as propane or natural gas can also help lessen emissions for those who still require a personal vehicle, while alternative fuel sources including hydrogen and E85 may prove beneficial over time when mass produced on a larger scale .
assistant
As air pollution from vehicles is a major environmental concern, what are some effective methods for reducing it?