Expanding Its Horizons?

The Yarra Riverkeeper Association (Australia) found in 2020 that 50% of the litter in their river was expanded polystyrene (https://www.theguardian.com/environment/2021/mar/14/it-looks-like-snow-how-australia-plans-to-fix-the-horrifying-blight-of-expanded-polystyrene). Expanded polystyrene is a real eye-sore, as well as being problematic for river animals. The Association feel most of this junk, comes from badly controlled loading docks at shopping centres. Building sites may be an additional source. I would just add, that expanded polystyrene is also used to make containers for fast foods. Fast food consumers are often unfussy in their disposal of waste habits (my picture is the river Tyne in the English Newcastle)?