Overview. If you frequently experience shortness of breath or you hear a whistling or wheezy sound in your chest when you breathe, you may have asthma â a chronic condition that causes inflammation and narrowing of the bronchial tubes, the passageways that allow air to enter and leave the lungs.
1 At 47,958 kilometres (29,800 miles) in total length, the Pan-American Highway is the longest road in the world.  The road starts in Alaska, North America and ends in the lower reaches of South America.
Longest 3di's. These highways are all longer than 65 miles (and interstates 86 (west), 19, and 97). For comparison, the longest orbital freeway in the world, in the words of the 2001 Guinness Book of World Records, is the M25 motorway (121.5 miles) encircling London: a 3di in function if not in name. The longest full beltway in the U. S. is Interstate 275 encircling Cincinnati.