Inflammation of the lungs and bronchial tubes are also common causes of shortness of breath, as is injury to the respiratory tract caused by smoking or other toxins. Shortness of breath may occur with injury to the lungs, such as a collapsed lung (pneumothorax).
In the United States, pea soup without qualification usually means a perfectly smooth puree. Split Pea Soup is a slightly thinner soup with visible peas, pieces of ham or other pork, and vegetables (most commonly carrots) and is usually made from dried, green split peas.
Green split peas are often seen next to the dried peas and beans in the store, but these legumes have the advantage of cooking faster than beans or other pea varieties. They also do not need to be rehydrated overnight. Since they have been split, they can absorb water faster than whole beans and peas.