Answer:
The city can build more convenient public transportation like trains and buses to transport people around in large numbers, reducing the amount of cars.
Likewise, the city can also find alternative options of energy sources to more renewable ones, like investing in a hydroplant and solar panels.
The city can also put up conveniently located bicycle stops with bicycles up for rent at an affordable cost, that will encourage more people to take other modes of transportation, while exercising as well.
Lastly, the city can also put up car taxes, to further reduce the numbers of cars on the road as not many people will be willing to pay the car taxes.
