However, oxidative stress is actually useful. in some instances. For example, oxidative stress. induces apoptosis to prepare the birth canal for. delivery. Also, biological defense mechanisms. are strengthened by oxidative stress during. appropriate physical exercise and ischemia.
The 100th anniversary of the Triangle shirtwaist factory fire, which killed 146 workers in a New York City garment factory, marks a century of reforms that make up the core of OSHA's mission.
The largest disaster involving smokejumper deaths on the job was the Mann Gulch fire blowup of 1949 which occurred north of Helena, Montana at the Gates of the Mountains area along the Missouri River. Thirteen firefighters died during the blowup, 12 of them jumpers.