I will answer the question "What are we going to do with all this litter?" based on the provided suggestions and results.
Suggestions:
1 Fine people who litter.
2 Get young people involved in clean-up programmes.
3 Set up recycling schemes in your area.
4 Only buy products with biodegradable¹ packaging.
¹ things that can break down or decompose on their own.
Results:
a If people know that they will have to pay if they litter, they will stop doing it.
b This way landfill sites will not become so full.
c They will become interested in keeping parks and their neighbourhoods clean and tidy.
d Household rubbish will be put to good use and the amount of garbage will be greatly reduced.