Study: https://www.pnas.org/content/early/2019/09/24/1909816116
From my experience, China has yet to instill environmentalism in their public. It has definitely improved since I first started visiting in 2001, but they have a long way to go. One good thing about Xi Jinping is that he sees environmentalism as an opportunity. Hopefully the CCP will crack down on this.
You'd think you could get satellite photo evidence of dumping.
We probably can and do, but I don't know how much good that would do. Hassan Minhaj did a show about cruise ships and laws on his Netflix series Patriot Act and the takeaway I got from it is that everything is extremely slippery. Chances are, even though his focus was cruise ships, this kind of issue involves other types of vessels from cargo ships to fishing ships.