The headmaster must prepare two dustbins. The first dustbin in blue color for organic, and the second dustbin in yellow color for non organic. Unfortunately, not all of the students can understand which one is organic or non organic, so the cleaning service must separate it again manually. The organic can be recycled in factory, so it can be produced again. For non organic can be used for fertilizer. It will be the fertilizer for plants and animals food.
Moreover, the plastics of food. shampoo and detergent can be used for other handcraft. Such as bag and wallet.
