private cars or public transport

We have good transport systems :We can use bus or subway transfer within 30 minutes for free. And essential route can run even the users reduce so the profits go down, because the government support the bus company with taxes that I\'ve given them ahead. Plus the fee is cheap. So many people easily use public transport whenever,wherever they want to go.If private cars reduce,pollution problem can decrease.It can be good things for earth. The other hand the car industry is huge over the world, as long as this companies keep producing their cars and employees make money by this work, private cars will be increased.As I get older, I can see the difficulties that the elderly use public transport.it\'s hard for them to take on a bus get off a bus by themselves.Someone might help them.They would rather take a taxi or a private car.But it isn\'t included in the system.I\'ll be 80\'s,the public transport system would be improved for the elderly or I\'ll want to have power for driving by myself.