Is it necessary to emigrate for environmental problems?

It depends on the meaning of "environment". Air, region, culture, which environment? If the people around you are not so good, you'd better emigrate. This is a law of expectation. For example, it is conceivable that foreigners will not be nice to China people, but they are polite and have no expectations. China versus China, that's it! And I don't know when I will be punished, which is in trouble!