China
If the life expectancy is high, then the wealth of the country will be high as well
Norway is the Scandinavian country that has oil wealth, primarily due to its significant oil reserves in the North Sea. The country has managed its oil wealth through the Government Pension Fund Global, one of the world's largest sovereign wealth funds.
The best way to determine the wealth of a country is to examine it's resources. If a country has excellent medical care and schooling then they are likely rather wealthy.
what is the overpopulation for striped dolphin
they did nothing about this!
Switzerland
Nothing makes people poor. Poverty is the natural state of people. Rather, you should ask what makes people rich. The lack of the things that make people rich is what makes people poor.
Specifically, if you mean wealth distribution in a certain region or country - the government of that country is the one responsible for managing and distributing the wealth of the country to its people to job creations, housing and other infrastructure and road development, education development programs, and a lot more.
how can overpopulation cause an ecosystem to change
overpopulation
more than one.