We’ll see it like this, all stuff that is renewable is ”good” for the environment.
So, plastic isn’t renewable. We can’t burn it and make it to something else. (It eventually decomposes, but I can take more than 100 years!)
And the plastic seems to get thrown into our seas, and by that the fish and all the other sea creatures eat the plastic and then we eat the rich and stuff goes down..
Plastic isn’t good for the environment and we’ve got to much plastic that is getting thrown in the water! (Hope this answer helped)