Don't throw it away!

Old metal can be used to make new metal. For example, car,cans,Christmas decorations, knives, and forks and spoons.
Old grass can be used to make new glass. For example, jewellery,wine bottles,mirror and beads.
Old paper can be used to make new paper. For example, toilet paper,newspaper, paper cup, chip cotton, cereal pocket,egg box model,and egg box.