Demand on Texas oil increased and many people from the northeast moved to Houston to profit from the trade Pasadena has refineries and the Port of Houston is among the busiest in the world Since the 1980s oil bust the Houston area aimed to diversify its industries. The gold brought home from Guinea stimulated the commercial energy of the Portuguese and its European neighbours especially Spain Apart from their religious and scientific aspects these voyages of discovery were highly profitable!
Human infections gained worldwide transmission vectors for the first time: from Africa and Eurasia to the Americas and vice versa the spread of old-world diseases including smallpox flu and typhus led to the deaths of many indigenous inhabitants of the New World. .
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