For what unique structure were the 1st smoke detectors developed?
Do you know the school board and then your parents taxes may go to pay for false alarms? They should be getting it fixed right away. And think of this: while the fire trucks come to your school, someone with a real fire may have to be serviced by crews from farther away and the seconds difference may cost someone their life. Send this answer to the kid at school or post it up somewhere. Grow up kid at SCHOOL, get a life and let others LIVE theirs.
Yes, it is active and highly concentrated. Enjoy!