Don't Worry, no problem, it's going to go away. We've been told that eventually "plastic" will decompose. At least some or most of it. Now, you say, eventually, may never come. Is it time for a little concern? Science has now informed us that mosquitoes ingest plastic, as part of their food chain. According to the article from New Scientist, below, it remains in their system, even into mosquito adulthood and they can pass it on. This article is definitely a must read: New Scientist, September 19, 2018, Mosquitoes Are Eating Plastic And Spreading It To New Food Chains.