The given series of diagrams illuminate the process of waste management, in this case old beverage metal cans being recycled to new aluminium cans. To come up with new cans, 7 processes of recycling old cans is passed through and involves picking old cans and cleaning, compressing, melting, rolling and recycling.
Overall, we can observe that the initial two stages involve collection of the used tins and transportation to the processing plant. The whole series of activities starts with direct human effort and from stage 3 to 6 it is more of machine-oriented.
The essential materials for recycling aluminium cans are obtained mainly from garbage waste. The used cans when collected are transported to the processing plant where they are cleaned, sorted, shredded, compressed after which they are subdued under high temperatures to melt the aluminium.
Once the raw materials have melted, they are made into rolls of metal. From the aluminium rolls, new cans are manufactured which are then used to package different beverages ready for the market.
The illustration provides for us a series of stages from waste garbage cans to the recycled new cans in a clear and well laid out cycle, an interesting process of reducing land pollution as waste is transformed to new and useful products for the consumers.