The Trump II admin also made posts shut these monitors down. In many cases they were the only reliable air monitors in country, and they were little shoestring operations
In run-up to 2008 Olympics, US Embassy took radical step of posting live 'Beijing Air' readings from PM2.5 sensor on embassy roof. The air was *really* bad. PRC gov protested this intrusion. It later launched its own feed. Right now: Beijing air "good." DC air "unhealthy." Was 185 in DC this am.