(4) With the exception of hoses used to extinguish fires, any hose connected to. a fire hydrant must be equipped with either an approved backflow prevention. device or an approved four (4) inch air gap, unless in the Department's opinion, the application does not pose a backflow hazard, such as watering a community.
What was most likely the cause of Marie Curie's leukemia? a. Radiation c. Pollution b. Smoking d. Genetics. a. Radiation was most likely the cause of Marie Curie's leukemia.
There's evidence that in some people, the accumulation of homocysteine may be caused by a genetic defect, but in others it's simply the result of a vitamin B12 deficiency (although shortages of folate and vitamin B6 can do the same).