Many people do not understand what the root causes for the environmental problem in China and the Western economic problem are.
It is exactly globalization.
With the current global economic structure, goods produced in China are cheaper, because the costs for some items, for example, environmental issues, are not paid.
When cheap Chinese products are delivered to the Western countries, environmental problems are left to China. In the mean time, the cheap products from China make many Western plants bankrupt due to their failure in the competition on the market.
After some people in China get rich this way, they are trying to emigrate to Western countries, to avoid their responsibilities.
Eventually, Western countries will get a share from the environmental problems in China, such as polluted air.