Air is Purer Than Earth's The orbiter's air is cleaner than Earth's, and hay fever sufferers will welcome its pollen-free atmosphere. Its air is made up of 80 percent nitrogen and 20 percent other gases such as argon and neon. The orbiter s environmental control system circulates air through filters to remove carbon dioxide and other impurities. Excess moisture is also removed, keeping humidity at comfortable levels. The orbiter crew requires only ordinary clothing.
People can move about, work, and relax unencumbered by bulky space suits.
An Attractive and Healthy Menu Shuttle meals are tasty and nutritious. They can be eaten anywhere, although crew members normally congregate in the middeck area for their meals. Trays holding the food can be attached to a crew member s legs or to any orbiter surface with adhesive straps, removing the need for a table and chairs at mealtime. Meals are served in a special tray which separates the different food containers and keeps them from lifting off and soaring around in the weightless cabin. Packages of food that have to be warmed are placed in the galley oven before going into the tray.