(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.
What Really Causes Cancer. Most people think that DNA damage is what causes a cell to be cancerous. While it is true that cancer cells may have DNA damage, it is highly unlikely that DNA damage can cause any cell to become cancerous. In fact, the DNA damage is a result of the true cause cancer. So let us discuss what really causes cancer. There have been many discoveries about cancer in the past 125 years. For example, William Russell (1852-1940), in 1890, discovered that there are microbes inside and outside of cancer cells.