The three major ways is through water, food, and/or air
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Water pollution was a major problem in ancient times. It was the reason the Romans built the aqueducts and stopped taking water from the Tiber. By the time the Middle Ages started, the water in Europe was nearly all polluted to some degree.
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http://www.travelchinaguide.com/essential/water-transport.htm your welcome:D
In the North, because the North European Plain is fertile and largely flat.
the alaska river is Gino river
three major ways Asians use the land is by mining growing crops and water
The Danube; Rhine; Loire; Volga; Vistula; Weser; Rhone are among Europes' largest rivers.
any lakes or rivers
inkng,and cooking
Sewage,agricultural chemicals and industrial waste are some of the major contaminants of water.