I hangout around LinkedIn these days to get into all this but I am not sure where you are. I discovered there is a whole of complex chain based on waste and it's fascinating.

Where I am from, there is a company that sells permit and storages to turn waste into energy. Then they also issue carbon certificate which then re-sold to bigger companies like nestle, etc for them to re buy it. And there's also a whole lot of trading platform exclusively for these🤣

https://www.xpansiv.com/trading-platforms

Now, I wonder if environmental activist knows about all these "capitalist" side of it all.

If you are interested in the blockchain version, there's something called "Plastiks" it's based on polygon here it is

https://token.plastiks.io/