; Chlorine - respiratory effects Mission Bend (mostly in Fort Bend County), Rita (2005) Transit The major environmental threats to the Gulf are agricultural runoff and oil drilling. . 16.6 Gender and social history By the early 20th century the Democratic Party in Texas started using a "white primary." Restricting the Democratic primary to white voters was another way of closing minorities out of politics as the primary was the only competitive contest for office in the one-party state by 1906 the number of black voters had dropped from more than 100,000 in the 1890s to 5,000 the state also passed a law for white primaries in 1896 86.6% of all voters in Texas voted in the presidential election; following disenfranchisement voter turnout in 1904 was 29.2% and in 1920 was 21.6%. Texas lies at the juncture of two major cultural spheres of Pre-Columbian North America the Southwestern and the Plains areas the area now covered by Texas was occupied by three major indigenous cultures which had reached their developmental peak before the arrival of European explorers and are known from archaeology These are:. ! Duke Energy Field Services near Palestine on U.S Highway 79: the company operates facilities including refineries and oil wells throughout the region.
12.2 Cities Buffalo Bayou after Hurricane Harvey August 2017 Communities Areas of Alaska and British Columbia Explored by Spain. . Soldiers of the British Commonwealth forces from the Australian Army's 9th Division during the Siege of Tobruk; North African Campaign August 1941 Mexican Texas with Texas and U.S ranks History Language People Race and ethnicity Religion. Ephemeris by Abraham Zacuto in Almanach Perpetuum 1496 Comancheria before 1850; Jacinto City While technological superiority and cultural factors played an important role in the victories of the conquistadors in the Americas their conquest was greatly facilitated by old world diseases: smallpox chicken pox diphtheria typhus influenza measles malaria and yellow fever the diseases were carried to distant tribes and villages This typical path of disease transmission moved much faster than the conquistadors so that as they advanced resistance weakened.[citation needed] Epidemic disease is commonly cited as the primary reason for the population collapse the American natives lacked immunity to these infections, 3.1 Race and ethnicity A graph showing the major sectors of the Houston economy, Houston 13 See also Diplomacy (137) 5.52 Fountain of the Downtown Aquarium Houston in 2012. . .
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