Scale Wind speed (mph) Rating classifications
EF0 65–85 Weak
EF1 86–110 Weak
EF2 111–135 Strong and significant
EF3 136–165 Strong, significant and intense
EF4 166–200 Violent, significant and intense
EF5 >200 Violent, significant and intense
Figure 1. The six categories of tornadoes of the Enhanced Fujita Scale
EF5 tornadoes have happened in the Unites States, which are nines in Kansas, Mississippi, Iowa, Alabama, Missouri and Oklahoma. Some tornadoes can look the same but they do not cause the same damages even though the weakest tornadoes may kill. Examples of this fact is the report of tornadoes between 1997 and 2005 which states 3 people were killed by F0 tornadoes and 38 by F1 tornadoes in the United States. F0 tornadoes cause superficially damages to structures and the environment. The conventional building cannot be damage too much if the building is well constructed. This building …show more content…
Monolithic dome is the safest and friendliest building to the environment because it is energy efficient and also because it is easily maintained. The dome owner will save an energy such as 50% charges compared to conventional building. The efficient of materials used in the construction of the building has mot negative impact on the environment because these domes need small place use the less materials which is generally 50% to 75% lees material compared to a square conventional building. Also, Monolithic Company states “ This method of construction cooperate with the new technology of converting solar energy to electrical energy, of geothermal heating and cooling, and of energy-efficient windows makes it possible for new homeowners to be completely comfortable and self-sufficient. At the same time, generating noxious emissions, greenhouse gasses and power outages would be