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 Keystone Pipeline if it were built would have a maximum transport capability of 830,000 barrels per day. By the end of 2014, it is projected that 2 million barrels of oil per day will be transported by rail out of the Bakken region. Even if construction were to begin in 2014, the output of the Bakken region would far exceed what the pipeline will be able to handle.