4 Answers 4. active oldest votes. up vote 11 down vote. If it is sealed in an air tight container and the freezer always stays very cold so the meat never thaws-then chicken and beef will stay good indefinitely.
1 When sewer gases diffuse into household air, they gradually displace oxygen and suffocate occupants. 2  The effects of oxygen deficiency include headache, nausea, dizziness and unconsciousness. 3  At very low oxygen concentrations (less than 12%), unconsciousness and death will occur quickly and without warning.
Biogas production. One of the gases that lends human waste its stench is methane, which, as 13-year-old boys with matches worldwide must know, burns. A biogas digester collects methane as microbes produce it inside a closed container (oxygen can be deadly to microscopic methane-producers).