The Three Mile Island nuclear plant is located in Pennsylvania.
Atoms usually engage in chemical reactions which will end in complete outer electron shells. Most of the time, a complete outer shell usually means 8 electrons, except for a couple light elements which only require 2 electrons to have a whole outer shell.
It has been observed that the mid ocean ridge is formed by tectonic plates. It is a seafloor made up of basalt that is formed by two processes such as ridge pushing and slab pulling. It is submerged inside the ocean and is less than 200 millions years old.
The development of the population policies in the 20th century were due too multiple factors, the most important of which were:
- Fertility rates were starting to lower down, especially in the ''western world'' in the second half of the 20th century.
- Increased demand for labor force.
- The World Wars, especially the second one caused huge migration movements.
- Millions of people from less developed countries were trying to migrate to more developed countries in search of a better life.
