The city of Wuhan is considering building skyscrapers coated with a high-tech substance that can "eat" air pollutants. An artist is offering to suck particulates out of Beijing's dirty skies using a giant vacuum-cleaner-type device and sell jewelry made with the collected contaminants. One researcher is suggesting an "urban wind passage" in the Chinese capital, regulating the height and density of buildings so that smog has a dispersal channel.
Very interesting to see the arc of history repeating. I recall many of the crazy ideas here in California. A similar story was had when we needed water during a drought. And for our famously traffic-clogged highways.
When you go down the same road creating a problem we know is going to happen and just think you will "deal with it" later, the next phase is the outlandish responses to dealing with those problems. Eventually we get to the mature adult phase wherein we actually tackle the problems of our own creation. It would be nice if we could just jump to the last phase in the first place.