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.
With over 89 million inhabitants, Egypt is the most populous country in North Africa and the Arab World, the third-most populous in Africa (after Nigeria and Ethiopia), and the fifteenth-most populous in the world.gypt is the most populated country in the Middle East, and the third most populous on the African continent, with about 88 million inhabitants as of 2015. Its population grew rapidly from 1970 to 2010 due to medical advances and increases in agricultural productivity enabled by the Green Revolution.