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.
Claim To Fame: Worldâs longest road. The Pan-American Highway is the longest motoring road in the world. It has replaced Yonge Street (in Toronto Canada) as the longest road since changes were made to the configuration of Highway 11 and Yonge Street in the 1990s. The Pan-American highway links the mainland nations of the Americas and is an amazing 48,000 kilometers (29,800 miles) long.