This may seem a "TL,DR" post, but don't dismiss it. If anything, as mutual geeks, the science itself is fascinating. Ok...
Plastic actually causes more pollution during the recycling process (at least the tech that is widely used). This is why environmentalists avoid it. The main issue is that most people do not take the time in recycling. There are two plastic islands the size of Texas, one in the north Pacific and the other near the Indian ocean. The oceanic belt has picked up plastic items that were thrown out and created large masses about 3-4 feet deep.
The issue is more severe for third world nations in which plastic and garbage wash ashore. The main culprit is the e-waste generated from consumers tossing their mobile phones and electronics in the garbage, causing chemical pollution from the wires and batteries.
Newly Discovered 'Plastic Island' Shows Global Epidemic Worsening
A man in Japan created a household device that uses less electricity than a lightbulb and easily converts any plastic items into reusable oil, etc. It's amazing! If everyone had one in their household, imagine the waste saved and the money gained. Of course, oil and energy companies are lobbying hard against his efforts.
Japanese Inventor Creates Machine that Converts Plastic Bags into Fuel
Plastic to oil fantastic
Plastic to Oil Fantastic OW2.0
I seriously recommend everyone watch the YouTube video about this invention, that is currently being sold. It's incredible!
So yes, to respond to your comment, plastic is a huge issue.