Statistics. 1  Tram and light rail systems operate in 388 cities across the world, 206 of which are in Europe; 2  Since 1985 120 light rail systems have opened; 3  Since 2000 78 systems have opened while 13 have closed. 4  15,618 km of track is in operation, with 850 km in construction and a further 2,350 km planned;
Gulf Stream. The Gulf Stream, together with its northern extension the North Atlantic Drift, is a warm and swift Atlantic ocean current that originates in the Gulf of Mexico and stretches to the tip of Florida, and follows the eastern coastlines of the United States and Newfoundland before crossing the Atlantic Ocean.
While the cold, less salty pool near Greenland may be some sort of balancing act in the Earth's complex climate, it could cause the Gulf Stream to weaken. A weakening Gulf Stream could have major impact on the weather and climate. The Gulf Stream is a strong ocean current that transports warm water northward just off the East Coast of the United States and sends branches of water along western Europe. The Gulf Stream is a part of the Atlantic's circulatory system.