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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 ...
Sayre Public Schools is a school district serving the cities of Sayre and Elk City in Oklahoma. [13] It includes the following schools: Sayre Elementary School; Sayre Middle School; Sayre High School; In 1994–5, the district was the defendant in a liability suit eventually decided by the Supreme Court of Oklahoma. [14]
Radon experiments at the Radium Institute in Paris, 1924. Radon is a naturally occurring radioactive noble gas discovered in 1900 by Friedrich Ernst Dorn (1848-1916) and is considered carcinogenic. Radon is increasingly found in areas with high levels of uranium and thorium in the soil. These are mainly areas with high granitic rock deposits.
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 ]
Tulsa Public Schools, with nine high schools and over 41,000 students, is the second-largest school district in Oklahoma. [208] In 2006, there were more than 90,000 students attending Tulsa County's public schools.
A portion of the Jenks Public School District extends east of the Arkansas River encompassing a part of the city of Tulsa south of 91st street. It is one of the fastest-growing cities in Oklahoma. As of the 2020 census, the city population was 26,017, compared to 16,924 in 2010, an increase of 49.4 percent.
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%.
Located in western Oklahoma, approximately 87 mi (140 km) southwest of Oklahoma City, [8] [9] it is the principal city of the Lawton, Oklahoma, metropolitan statistical area. According to the 2020 census , Lawton's population was 90,381, making it the sixth-largest city in the state, and the largest in Western Oklahoma .