The effects of living next to/by a volcano can be very deadly. If the volcano were to erupt, lava would burn down everything and you would be left homeless and the city (if there was one would be destroyed. You would also have lots of ash. Might not have a lot of time to prepare to leave. <span />
1.The area should have at least 5 Million square feet of leasable office space.
2.The area should have more jobs than homes.
3.The area must have 600,000 of leasable retail space.
4.The population perceives it as one place.(The area should have it i.e entertainment, recreation, shopping)
5.The area was nothing like a city 30 years
Medicine and safety regulations at the work place.
An important tool in understanding the actual numerical dates of past geologic events is radioactivity.