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 population in Lagos jumped significantly in a short period of time. In 2011, it was estimated to only have 11.2 million people. Prior to then, Cairo was the most populous city in Africa. Lagos is thought to be responsible for one-fourth of Nigeria's gross domestic product. An oil boom and a growing economy are thought to contribute to the fast population growth.
Its population is 12.7 million (12,700,800), which makes it 4rth most populated city of China. With population density of 1,900/km2, this city is the main center of Pearl River Delta, which is the leading manufacturing regions in China. 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.