Or maybe hold companies accountable for the damage their products do to the environment and stop allowing the blame to be shifted to individual consumers?
What does this mean? The environment is damaged because so much plastic is consumed. It then follows that to reduce damage to the environment, less plastic must be consumed.
So we have come to the conclusion that we need less plastic to be consumed, the question is how. Obviously no one wants to consume plastic, since plastic is nice and convenient and most importantly, cheap.
Therefore, if you make plastic more expensive, people will consume less of it (since they have limited amounts of money). Also known as a tax.
Keep increasing the tax until the alternative becomes a more affordable option.
Probably 95% of what I have at home (plastics, electronics, furniture's paint and glue, chunks of relatively special metal like aluminium, chemicals used to clean anything, etc...) would harm the environment if I would just dump it anywhere without control => if you would want to hold companies acountable for all that stuff then we would be back to the stone age => in my opinion a combined organized disposal by endusers + more taxes on products which are "difficult" to dispose of (difficult to implement? most taxes target "consumption" and not "production") + a general "push" (by media & social) to be aware of problems related to such products are the only option.