How to Immigrate to the United States

Webster asked:

I am doing a research project and I am having trouble find information on Puerto Rican immigration to the united states. please help!

Earl asked:

So far I have the examples of reducing over crowding in other countries, a reduced need for large familys which will result in a lower population worldwide and they provide cheap labor which would allow companies to use the savings to reduce pollution.

Coordinates-TW asked:

I have been researching US immigration law, but I am somewhat confused about the so-called “chargeability areas.”

Are “chargeability areas” actual geographic areas? How do those differ from countries? I have heard that there are 193 countries in the world today. So is that the number of “chargeability areas,” or would “chargeability areas” be more numerous?

Is there a full listing of “chargeability areas” on the internet somewhere? What is the URL?

I have been searching for a full listing of “chargeability areas” in Google and Yahoo, but have been unable to find it.