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.
Harare is the capital city of Zimbabwe in southern Africa. Harare is Zimbabwe's biggest city with a population of around 2 million; it's also the commercial capital of the country. The British founded the city in 1890 and called it Salisbury.