I wish there was more than anecdotal evidence for this. China has very strong statistics for their pollution levels that are often recorded in their weather rep

I wish there was more than anecdotal evidence for this. China has very strong statistics for their pollution levels that are often recorded in their weather reports. For a project this big, they should be able to quantify the results instead of just relying on what people say about the air :/ EDIT: I'm a dummy, although the article leaves with an anecdotal, there are some nuggets of stats "The average reduction in PM2.5 – the fine particles in smog deemed most harmful to health – fell 15 per cent during heavy pollution." & "Cao said the results were preliminary because the experiment is still ongoing. The team plans to release more detailed data in March with a full scientific assessment of the facility’s overall performance."