Explain how the recruitment of mine workers impacts public health
Great numbers of workers in the mines are temporary migrants from rural areas. Migrant labor has helped spread tuberculosis and HIV, the virus that causes AIDS. Most miners are single or married men who spend extended periods away from their wives or girl- friends, and it is common for them to contract the virus from prostitutes and then return home to their villages, where they spread it still further. The HIV infection rate among migrant miners working in South Africa was more than 25 percent in 2011—a high rate, but down from 40 percent just three years earlier.
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Darwin suggested that the mechanism by which evolution proceeds is ________. Fill in the blank(s) with the appropriate word(s)
Social modernization involves many aspects that revolve around
A) sustainable environmental policy. B) the education and enfranchisement of women. C) economic development. D) technology.
________ tend to increase the explosive potential of a magma body beneath a volcano by the greatest amount
A) High viscosity and lots of dissolved gas B) High viscosity and very low levels of dissolved gas C) Low viscosity and lots of dissolved gas D) Low viscosity and very low levels of dissolved gas
In an air parcel the average speed of the molecules is directly related to the air ____________________, and the molecules colliding against the parcel walls determine the air ____________________ inside
Fill in the blank with correct word.