USA
immigrating to other countries
they can help other countries by eating vegetarians .
Different countries have different legislation regarding chastisement of a child. In some countries it is prohibited in others allowed. Check the law where you live.
to work and live there because of overpopulation in SEA countries
You need to be more specific. Different countries have laws regarding citizenship.
No, Puerto Rico can not tip over of overpopulation. Unlike many other countries, rather than overpopulation, Puerto Rico seems to be highly unpopulated. As such, it would be impossible either way to tip it over physically or otherwise.
overpopulation, housing problems, pollution and health, unemployment and transport
Developed countries are thinking and the developing countries are even not to do anything because they are struggling for survival and fulfilling their basic needs.
In the US no, there is not. Other countries have different legislation regarding marriage.
Different countries have different laws regarding timber cutting. Some areas are protected, where logging would be illegal, but many areas are not.
Because the two countries have different rules regarding 'who gets what'
That depends on how old the money is. Different countries have different regulations regarding this. There will also need to be an explanation as to where the old money has come from.