But if you're able to collect those plastics it would be better to send them to a well managed landfill rather than make them into bricks.

I lived in Kenya. Stuff under the road doesn't stay there long. They get incredible abuse and little maintenance. It's hard to think of anything that would generate more microplastics than putting it in a road. Plastic in the ocean, in your garden, in an animal's mouth, anywhere else, just can't compare to the grinding action of thousands of cars daily.

The road? These are footpath pavers.

Footpath state in Nairobi is awful, I haven't spent much time out of the capital.

He obviously didn't read the article.

Nobody is recommending that we throw used plastic in the river as an alternative.