Find number abc
If c4bb2 + 4cbc4 = 1aa1a6 find number abc.Correct answers: 67
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math
First EPA air pollution injunctionIn 1971, in its first such action, the U.S. Environmental Protection Agency (EPA) shut down heavy industries in Birmingham, Alabama, when air pollution on this day was reaching dangerous levels. It was an emergency action under the Clean Air Act (1970). The EPA asked a Federal judge to issue a temporary restraining order. Among others, U.S. Steel had been belching too much smoke into an atmospheric inversion (stagnant air mass). Among idled workers, one said, “we're going to choke to death before we starve to death.” Six months before, the city had suffered a five-day crisis that spiked on 20 Apr 1971. At that time, while the state failed in enforcement, the EPA was not notified early enough to start emergency action. Days with high particulate counts in the air thereafter drew close EPA scrutiny.« |