text: In dense cities there is smog that is polluting the air and making it hard to breath. If you live in an area like this for a while it can get you really sick. It can give you lung cancer, amonia, and many other things. Living in a place like this has been proven to be almost the same as being a smoker. It will hurt your lungs very badly. Breathing this air can also make the quality of life alot worse. It can make you depressed, or angry and can cause alot of other problems.