Shortness of breath is by far the most common of emphysema symptoms. Most people with emphysema first notice something's wrong when they become winded during a previously routine activity. This might be climbing stairs or mowing the lawn. The shortness of breath in emphysema results from structural changes in the lungs.
The African city with the largest population is Lagos, Nigeria. In 2014, the city was estimated to have a population of 21 million people.
6) Lagos. With population of 13.4 million (13,400,000), Lagos is the most populated city of Nigeria. It is also the seventh most fastest growing city in the whole world. Having population density of 13,405/km2, Lagos is also the most populated area of Africa. Tourism is also increasing in Lagos, same like its growth.