There are adoption agencies from the US that go and pick up children (mostly girls) left in a basket outside of town their parents left them in to either be adopted by foreigners or eating by animals. This is why so many Asian children in the US are adopted.
Check out how people in rural areas of China live. Many don't have running water or electricity. The smog in Chinese cities is almost unbearable. Remember the Beijing Olympics? The US is by almost every standard a better place to live.
China's life expectancy has just passed America's:
https://qz.com/china-life-expectancy-exceeds-us-1849483265The air quality thing is empirically testable, and really it's not nearly as bad as you're implying. "Unbearable."
https://waqi.info/On average, air quality in the US is better. But, on the whole, you've gotta figure that the average Chinese city has air quality like the US did back in the 70s and 80s... Before the US finished outsourcing all of its manufacturing and heavy industry to China. And it's really not that bad. As of right now, the smog in parts of California is just as bad as the smog in Beijing. It ain't killing anybody.
As for muh adoptions, I can't find statistics for any year past 2016. But, in that year, ~2200 children were adopted from China to the USA. There were 17,860,000 births in China that year. So you're crying like a woman over something that affected far less than 0.1% of children. And foreign adoption has probably declined like crazy since 2016, so the problem you're describing probably doesn't even exist any longer.
In the US, >0.5% of children are born addicted to opioids. e.g.
https://www.nbcnews.com/storyline/americas-heroin-epidemic/born-addicted-number-opioid-addicted-babies-soaring-n806346It's easy to point fingers and shriek about China. But when you do that, you're literally supporting the globohomo agenda, which views China as the #1 threat to their perverse way of life. Sure, China has its problems -- but the retards and propagandists blow them wildly out of proportion.