What can we do about the problems we have in our city?

First of all, the air is not exactly clean and the pollution caused by cars is so dangerous that people must wear masks in the street.
Secondly, if we go by underground we can avoid traffic jams, but perhaps the best way of getting around is by getting on our bike. It can be more dangerous but we can have special bycicle lanes and going by bike is a good exercise for us.
We mustn`t drop litter on the streets, in our parks and on our beaches.
Finally, we should recycle our bottles, plastic and paper and we will all have a cleaner planet.