(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 are different causes for the different types of leukemia. Here are some known and strongly suspected causes: Exposure to a special type of radiation (artificial ionizing). Viruses like HIV and HTLV-1. Benzene and particular petrochemicals. Chemotherapy agents (alkylating) used for treating previous cancers.