EnvironmentSample content
What Really Happens After You Drop Something in the Recycling Bin
Recycling is not magic and it is not pointless. It is a sorting problem — and how you throw things away decides whether it works.
4 min readWritten for ages 6–8, 9–11
A bottle goes into a bin. Weeks later something is made from it. In between is a long chain of sorting, and every step of that chain works better or worse depending on what you did at the bin.
The chain, step by step
- Collection: waste is picked up. If wet food waste is mixed with dry paper, the paper is often ruined and cannot be recycled at all.
- Sorting: machines and people separate materials — magnets pull out steel, air jets lift light plastics, eddy currents flick out aluminium.
- Cleaning and shredding: material is washed and broken down into flakes, chips or pulp.
- Remaking: the raw material goes back to a factory as an ingredient.
Why some things recycle better than others
Metal and glass can be melted and remade almost indefinitely. Paper fibres get shorter each time, so paper can go round several times before the fibres are too short. Many plastics can only be remade into something less demanding than they started as.