Aromatase inhibitor. Aromatase inhibitors (AIs) are a class of drugs used in the treatment of breast cancer in postmenopausal women and gynecomastia in men. They may also be used off-label to reduce increase of estrogen conversion during cycle with external testosterone. They may also be used for chemoprevention in high risk women.
Supporters of the Keystone XL Pipeline herald it as a job-creating machine, producing as many as 119,000 jobs. But only 3,900 workers will actually be required to build the pipeline to carry oil from Canada to the Gulf of Mexico, according to the U.S. State Department, and those jobs will only last for a year. There will be 35 permanent positions created.
The pipeline would run 875 miles from the Canadian border to Steele City, Neb., where it would join already-built sections of pipeline that carry oil to the Texas Gulf Coast. Keystone XL would carry 830,000 barrels of crude oil each day through its 36-inch pipeline that would run along a 110-foot-wide ribbon of land. Building a project this size will take 400,000 tons of steel and provide work for 7000, laboring over a period of about two years.