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the hygienic removal of human waste.
a chemical used as an antiseptic to prevent bacterial and fungal growth.
the factor that changes in an investigation and is not under the control of the investigator....
a molecule that stores large amounts of energy that can be used for metabolic activity.
a molecule that accelerates (speeds up) a chemical reaction, by lowering its activation energy,...
the protection of species, habitats and ecosystems and the management of natural resources.