> But what are the efforts to combat plastic concentrated on?

You've shifted the goalposts here. I was responding to the assertion "plastics were not a problem" and the implication that they still wouldn't be a problem if it weren't for "radical environmentalists."

You're agreeing with me that plastics are a problem but then creating a strawman in the idea that I believe current efforts to reduce plastic pollution are beyond criticism. I haven't taken this position.