Pulmonary edema occurs when the alveoli fill up with excess fluid seeped out of the blood vessels in the lung instead of air. This can cause problems with the exchange of gas (oxygen and carbon dioxide), resulting in breathing difficulty and poor oxygenation of blood.
Currently buildings are limited to a height of 200 meters and are subject to not contrasting the view of Mount Royal, the city's central green space, with the only exception being antennas and communication towers, that are allowed to reach 223 metres (732 ft) above mean sea level.
With the number of officially âtallâ buildings -- at least 656 feet (200 meters) -- doubling over the next ten years, and the number of âmegatallâ buildings -- at least 1,969 feet (600 meters) -- expected to jump from two to 10 by 2020, building construction around the world is literally reaching new heights.