. 202 Waste Management 9 Tourism 1930 292,352 111.4% An expedition commanded by Pizarro and his brothers explored south from what is today Panama reaching Inca territory by 1526. After one more expedition in 1529 Pizarro received royal approval to conquer the region and be its viceroy the approval read: "In July 1529 the queen of Spain signed a charter allowing Pizarro to conquer the Incas Pizarro was named governor and captain of all conquests in New Castile" the Viceroyalty of Peru was established in 1542 encompassing all Spanish holdings in South America. Heat and humidity in Houston make air conditioning important in day-to-day life. Most indoor workers spend the hottest part of the day in air conditioning After World War II air conditioning stimulated the growth of Houston called the most air-conditioned city in the world in 1950 for construction workers landscapers and others who must work outdoors there is little relief from the summer heat and humidity Industrial workers automobile mechanics and others who usually work in non-air conditioned indoor spaces often rely on large electric fans to provide some relief; German immigrants started arriving in Texas and Houston after the Revolutions of 1848 in the German states Many were educated and arrived with capital to set up businesses or buy farms the port in Houston was getting some shipping business but the shallowness of the water hampered massive shipping During the 1850s the Houstonians decided to build a rail system to connect their port with rail links Eleven companies built 451 miles of track before 1860 Mexicans who were one of the earliest immigrant groups to Houston worked as railroad builders and stayed in the area.[citation needed], Houston Texas Business Directory School Trustee Pct 1 Pos 6 Erica Lee Democratic Reconstruction through 1900. .
Italian invasion of Ethiopia (1935) Yalta Conference held in February 1945 with Winston Churchill Franklin D Roosevelt and Joseph Stalin. .
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