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The results of a methodical ten-year-long, case-controlled study of residential radon exposure in Worcester County, Massachusetts, found an apparent 60% reduction in lung cancer risk amongst people exposed to low levels (0–150 Bq/m 3) of radon gas; levels typically encountered in 90% of American homes—an apparent support for the idea of ...
Radon is thus assumed to be the second leading cause of lung cancer after smoking, and accounts for 15,000 to 22,000 cancer deaths per year in the US alone. [9] [better source needed] However, the discussion about the opposite experimental results is still going on. [10] About 100,000 Bq/m 3 of radon was found in Stanley Watras's basement in 1984.
The construction industry is the number one user of phosphogypsum in 2020, with 10.5 Mt used as concrete set retarder and 3.5 Mt used in drywall. [13] It is also used as a chemical feedstock for producing sulfates , and as a soil conditioner similar to regular gypsum. [ 14 ]
The population density was 14 inhabitants per square mile (5.4/km 2). There were 4,565 housing units at an average density of 7 per square mile (2.7/km 2). The racial makeup of the county was 94.66% White, 3.83% Black or African American, 0.41% Native American, 0.12% Asian, 0.03% Pacific Islander, 0.16% from other races, and 0.78% from two or ...
Putnam County is a county in north central Missouri.At the 2020 census, the population was 4,681. [1] Its county seat is Unionville. [2] The county was organized February 28, 1845, and named for Israel Putnam, a hero in the French and Indian War and a general in the American Revolutionary War.
Centrally located the state's Mid-Missouri region, its county seat is in Columbia, which is Missouri's fourth-largest city and location of the University of Missouri. As of the 2020 U.S. Census , the county's population was listed as 183,610, [ 1 ] making it the state's eighth-most populous county.
S&P 500 futures were last 0.5% higher while Dow and Nasdaq futures were up 0.6%. Even beaten-down European futures rose 0.7% and the friendless euro, which hit a two-year low on Friday, bounced 0.5%.
A fire in 1888 destroyed the first school building and it was replaced by a much larger two-story brick structure. [6] In addition to the public school, Salisbury Academy, opened in 1888, provided for higher education at what today would be considered a junior college level. North Missouri Institute, another college-preparatory school, opened ...