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.
They are: Pisum savitum, which includes both garden peas (sweet pea, inedible pod) and snow peas (edible flat pod with small peas inside) and Pisum macrocarpon, snap peas (edible pod with full-size peas). They are easy to grow, but with a very limited growing season.