"The West exported its toxic factories to exploit cheap Chinese labour and its lax environmental laws, so people like you can go hiking in the woods, breathe clean air and lecture the developing world about pollution."

Yep, and China begged for more while it illegally appropriated all of that western technology in the process to build your modern developed society. You're welcome.

China is no longer a developing country. No country with a nuclear arsenal and a space program is a developing country.