Let's focus on local conditions when looking for local solutions to local problems.
haha! landfill are cheap in third world country, and it's easy to guess they're unregulated... it's hard to be optimist here.
Just to be clear, I support the use of paper and heavy-duty plastic bags for a fee, because they are less likely to be caught by the wind and can be reused for a long time. I abhor littering. But I do not support guilt trips over landfill use in developed countries with highly regulated landfill designs.
Recent studies indicate that most of the plastic in the ocean comes from discarded fishing nets and gear. (Nets alone are almost half.) The idea that people are littering straws and water bottles and that that's what is clogging up the oceans is just way wrong.
I'd assume some are still using dumps.