I saw this story some other place earlier, and it was mentioned that 28% of plastic pollution of the oceans is tire debris. Plastic is organic. As it breaks do

I saw this story some other place earlier, and it was mentioned that 28% of plastic pollution of the oceans is tire debris. Plastic is organic. As it breaks down, it does so in an endless variety of organic molecules. These being similar to biological molecules, they readily interact with all sorts of biological systems. Those systems have all seen a few billion years of optimisation, making it unlikely for any random interference to be beneficial.