PROPOSING AND DESCRIBING THE PROBLEM :)

Mass transportation system (Pollution)

We know how mass transportation has been a big cause of polution, it is a worlwide problem that is caused because of many industries, but we can change it in the matter of mass transportation.One of the strongest solution is the use of bicycles instead of cab for going to close places, it helps to decrease the pollution and it also healthy.

Also, car pollution reaches from water pollution  to noise pollution , air pollution  to global warming , to impacting uman health , on- road  motor vehicle not only  realease carbon dioxide but also oxides of nitrogen , and one of the strongest solutions is to use  environmental cars . 

And remember :
If you want to help reduce global warming , let alone air pollution, one of the best things you can do is to get out of your car.Walk or ride a bicycle for short trips, or take public transportation for longer ones. Either way, you will significantly reduce the amount of pollution .