Production will always have some waste and pollution. China has high pollution because we do a lot of production there. As I pointed out above, on both a per-capita and a per-production basis China pollutes less than many industrialized nations (US. Germany, Japan, South Korea, Canada, Taiwan) and many developing nations (Singapore, Malaysia).
Given current manufacturing data, moving production out of China to other countries would likely increase pollution.
A lot of people don't realize how quickly China is changing. Things that were true just a few decades ago are often no longer true.
Once China decided that pollution was a problem they went all in on addressing it. China has massive reforestation projects, huge incentives to switch to EVs, and much tighter energy efficiency standards.
Solar isn't even their only renewable energy source. China gets about equal amounts from solar, wind and hydro https://www.spglobal.com/commodityinsights/en/market-insights/latest-news/energy-transition/013124-coal-still-accounted-for-nearly-60-of-chinas-electricity-supply-in-2023-cec ~~together they make up a little less than half of their total energy production and the ratio keeps improving.~~ correction: those are projected ratios, not current ratios.
Of course, on a per capita basis, China isn't even close to being a top polluter. Unless you think that people in smaller countries deserve to pollute more, per-capita is the better measurement. China looks a little worse if you do that but it's still far from a top polluter by that metric.
As much skill as a 9 year old and a 16 year old can muster?
I wouldn't doubt that was his initial motivation for making the suggestions.
I also remember that he tried to back out of buying Twitter multiple times. While doing so he was pretty public about all the crazy crap he would do with Twitter.
Despite all that Twitter went to a judge and got them to force Musk to complete the sale. He's a crappy CEO for Twitter but it's kind of on the former Twitter leadership for forcing that situation.
Do you have a better metric?