That stuff is everywhere and it’s our fault.
Hurr actually it’s normal. The earth has cycles of microplastic abundance and we just happen to live in the peak of one. Duh.
Not my fault. Nothing that happens is my fault if I don’t have the power to influence it.
My point being, people tend to say it’s “our” fault when they mean humanity, but it’s not. 99.9999% of humanity have no power.