There is a tendency to utilize underground space for the less ornamental purposes of civilization; there is the Metropolitan Railway in London, for instance, there are new electric railways, there are subways, there are underground workrooms and restaurants, and they increase and multiply.
Polystyrene can be naturally transparent, but can be colored with colorants. Uses include protective packaging (such as packing peanuts and CD and DVD cases), containers (such as clamshells), lids, bottles, trays, tumblers, and disposable cutlery.
These plastics are found in bags for dry cleaning, newspapers, bread, frozen foods, fresh produce, and household garbage. Theyâre used in shrink wrap, coatings for paper milk cartons and hot and cold beverage cups. LDPE is used to make container lids, toys, and squeezable bottles (like honey and mustard).