Editing Snowpiercer (section)

===Third Class / C0558 > C0997===
Third Class comprises all of the remainder cars past the Night Car, down-train, and makes up for half of the train length. Most of the carriages are one-deckers. As per blueprints used by Commander Grey when he planned on gassing Third Class, it is divided into at least three sections: 
*Section 3.1 could be mainly residential
*Section 3.2 could be mainly industrial and cargo
*Agriculture is part of Third Class section 3.3
Third Class begins mid-train once with a Jackboot station and '''[[Border Checkpoint Car]]''' that can be closed to limit circulation up-train.

====Residential Section (Third Class, section 3.1)====
Third Class section 3.1 might be a residential section. While Third Class house a workforce of around 1,700 people, it offers very small accommodations to its passengers, with low-grade material and an industrial look. Individual space is a rarity in Third Class as most cars are either Agriculture Cars or industrial and cargo cars. Most residential compartments might be located mid-train. If cars mid-train still have windows, the further you go down-train, the fewer windows there are. Those shared compartments might be similar in design to the Engineers compartment in the Engine Car: small and efficient.

As all Third Class residents work in three shifts of 8 hours, the '''Mess Hall Car''' is open all-around the clock and switches from serving drinks to foods depending on the shift and time of day.

The '''Education section''' includes a series of '''[[Classroom (C0355)|Classroom Cars]]''' and Utility Cars. One of them was used by Primary Teacher Mary Elizabeth Gillies. The bright and colorful car was mostly comprised of about a dozen desks for the pupils and was decorated by the children's works. After Andre Layton's fake capitulation at the end of the civil war, that Classroom Car is used by the Folgers and Commander Grey for the signing of the official surrender act. The rebels used the opportunity that most of the Jackboot forces would be concentrated within seven cars around the Classroom Car to detach them from Snowpiercer, leaving the army, some First Class passengers and Rebels prisoners to freeze to death.

The Third Class '''Clinic (W-3.1-C0561-C0565)''' is led by Dr. Pelton, is part of a small Medical Section that might include other medical cars. During the civil war in Third, it acted as a field hospital and rebel camp.

====Industrial and Storage Section (Third Class, section 3.2)====
Third Class section 3.2 might include industrial, storage, and Cargo areas. It might be where Food Processing and Papermaking are located. It seems like some '''Cargo Cars''' have been emptied over time and repurposed by Third Class residents, selling drinks, food and craft products, the '''[[The Chains|Chains]]''' where younger and more carefree Third Class residents live in a community setting.

This section might also house a series of '''Battery Cars,''' as it is stated that at the end of the civil war, at least 37 of them were out of service.

'''EVA Cars''' are dispatched all along the train. One of them (W-3.4-C0991) is located at the Tail. Another (W-3.1-C0570) is located midtrain. 

Jackboots and Brakemen represented over 175 people. While it is known that they are Third Class residents, it is still unclear where in Third Class the '''Jackboot Garrison Car(s)''' is located, while it is hinted the '''Brakemen Garrison Car(s)''' is located between Sanitation and the Tail.

====[[Agricultural Section|Agriculture Section]] (AG-SEC, Third Class, section 3.3)====
Agriculture is one of the most essential parts of the train, both in size and importance, as it's cultures and systems produce a variety of food and materials necessary for the survival of Snowpiercer's crew and passengers, and might also serve to scrub carbon dioxide from the atmosphere and produce oxygen. Melanie Caville said to Layton that there are 131 cars ''"just like this one"'' while standing in a Greenhouse Car, but it is unknown if she was referring to the whole AG-SEC or only Greenhouse Cars. It is also unclear if Food Processing is part of it.

'''Greenhouse Cars''' are large one-decker cars whose roof is a dome made out of reinforced glass and where crops are farmed on regular cycles using hydroponics, natural and artificial lights: 
*Berries (14 cycles/year), including Chili peppers, Grapes, Cherries and Strawberries
*Potatoes (7 cycles/year)
*Cocoa (6 cycles/year)
*Wheat (4 cycles/year)
*Rice (3 cycles/year)
*Sugarcane (2 cycles/year)
*Cotton (2 cycles/year)
*Lettuce, Carrots, Cucumbers and probably other vegetables
*Floridian oranges, Apples, Mangos, Avocados, Bananas, Grapefruits, Olives and probably other fruits
'''[[Cattle Car]]s''' (Pig Cars, Goat Cars, [[Poultry Car]]s, Sheep Cars) are one-decker cars with large windows on one side where animals are bred for their meat, milk, eggs, skin, feathers, methane, and manure... Snowpiercer livestock includes pigs, goat, poultry and sheep. It used to include cows too but an avalanche in the Cascade mountains led to the Cattle Car to be breached and its entire livestock to instantly freeze to death and go extinct seven years after departure.

'''Aquaculture Cars''' produces a variety of food and products such as fish and seafood. The water enriched by fish wastes also produces a natural fertilizer used within the hydroponics system. The First Class Aquarium and Sushi Bar Car might have been a high-end version of Aquaculture Cars and was directly under the supervision of Agriculture Officer Dr. Jinju Seong.

This section also includes its own '''Water Reservoir''' as stated by Jinju Seong when discussing with Bennett Knox and Melanie Cavill about the consequences of the bovine extinction event. An old '''Apiary Car''' was closed down after the bee colony collapsed, three years before the revolution, resulting in bees going extinct. Refrigeration Cars are where the crops and food are conserved after farming and before being processed and dispatched.

AG-SEC systems are intricately intertwined and create an artificial yet fragile ecosystem within the train. After the extinction of bovine cultures, Chief Engineer Melanie Cavill had to think of another way to produce necessary methane the cows used to produce (goat farts). When Agriculture Officer Jinju Seong was tasked with devising a way for equal calories between classes, she angrily noted that lootings of AG-SEC Greenhouse Cars, Refrigeration Cars, and Aquaculture Cars at the end of the civil war led to crops destruction and food shortage.

==== Sanitation Section====
Sanitation is a necessary yet despised section of the train, located between Agriculture and the Jackboots Garrison Car at the Tail. This section might play a key role in the train systems. The industrial and windowless '''Sanitation Cars''' are equipped with compost units that transform organic wastes (manures, corpses...) into fertilizer using bugs and worms. This section might also include greywater filtration and treatment systems.

Due to the strong smells, working in Sanitation is not very well considered among Ticketed Passengers, to such extent that a team of three Tail residents is tasked with daily 8-hours-long shifts there.