China and Europe are experiencing Emigration. U. S.A, S. S.Africa and India are experiencing Immigration. Indonesia could be experiencing both emigration and immigration at the same rate which is why their graph shows a flat line in later years.

what are some scientific concepts that back this up?

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?

Why has two different alleles for the same trait?

Adescription of a type of bio biotechnology (genetic engineering, cloning, or artificial section) one benefit or one risk for the individual (based on whether you are for or against it) one benefit or one risk for society (based on whether you are for or against it) one benefit or one risk for the environment (based on whether you are for or against it)