TECHNOLOGY FOCUS - POLYMERS - Preferred Module: In the packaging module, the gaseous headspace comprises at least about 90% carbon dioxide. The gaseous headspace comprises from about 30% to about 35% of the internal volume of the tote. The gaseous headspace comprises about 35% of the total internal volume of the tote. The packaging module further comprises a holding element suitable for maintaining a hydrogen source internal to the tote. Holding element for the hydrogen source in the tote is a box configured to hold the hydrogen source and the fuel cell. The packaging module does not contain a gaseous source to maintain positive pressure within the packing module during transport or storage. The foodstuff is fish. The fish is fresh fish selected from salmon, tilapia, tuna, shrimp, trout, catfish, sea bream, sea bass, striped bass, red drum, pompano, haddock, hake, halibut, cod, and arctic char. The fresh fish is salmon or tilapia. Hydrogen source is selected from a bladder hydrogen source or a rigid container hydrogen source. Hydrogen source is a gaseous mixture comprising carbon dioxide and less than 5% by volume hydrogen. The packaging module further comprises a fan, where the fan is powered by the fuel cell. Preferred System: The system further comprises a temperature control system external to the packaging module where the system maintains the temperature inside the module at a level sufficient to maintain freshness of the foodstuff. Preferred Method: Alternatively, transporting and/or storing of carbon dioxide absorbing oxidatively-degradable foodstuffs comprises: (a) obtaining a pressure-stable sealed tote of limited oxygen permeability and a defined headspace containing a carbon dioxide absorbing oxidatively-degradable material, where the initial headspace occupies at least 30 volume percent of the tote and the gas in the headspace comprises at least 99 vol. percent gases other than oxygen, further where the tote consists of a flexible, collapsible or expandable material which does not puncture when collapsing or expanding, and further where the tote is connected to a module comprising a fuel cell and a source of hydrogen such that the anode of the fuel cell is in direct communication with the environment of the tote; (b) operating the fuel cell during transport or storing such that oxygen in the tote is converted to water by the fuel cell; and (c) transporting or storing the material in the tote. Transporting or storing is for a time period from between 5 and 50 days; or transporting or storing is for a time period from between 15 and 45 days. The method further comprises maintaining a temperature in the tote sufficient to maintain freshness of the material during transport or storage. The reduced oxygen environment comprises less than 1% oxygen; or the reduced oxygen environment comprises less than 0.1% oxygen. The reduced oxygen environment comprises carbon dioxide; or the reduced oxygen environment comprises carbon dioxide and hydrogen; or the reduced oxygen environment comprises carbon dioxide, nitrogen, and hydrogen. The fuel cell is programmed to cease operation after an initial period time that is sufficient to allow a natural minimization or cessation of gaseous exchange. Initial period of time is between about 0.5 and 50 hours. Fuel cell is programmed to cease operation when the oxygen level reaches and is maintained below a predetermined level. The predetermined level of oxygen is below 5% oxygen v/v. The predetermined level of oxygen is below 1% oxygen v/v. The module is disconnected from the tote after an initial period time that is sufficient to allow a natural minimization or cessation of gaseous exchange; or the module is disconnected from the tote when the oxygen level reaches and is maintained below a predetermined level. In removing oxygen from tote, the head space of the tote comprises from about 20 to about 40% of the internal volume of the tote. The tote further comprises an oxygen sensor. The low oxygen gas comprises carbon dioxide. The low oxygen gas source is programmed to cease operation after an initial period time that is sufficient to allow a natural minimization or cessation of gaseous exchange. The tote comprises an initial head pressure from about 0.1 to about 1.0 inches of water column above atmospheric pressure. EXAMPLE - No suitable example given.